diff --git a/main/badge/assign.php b/main/badge/assign.php
index eabac0c27b..c12b6345e3 100644
--- a/main/badge/assign.php
+++ b/main/badge/assign.php
@@ -9,7 +9,6 @@ use Skill as SkillManager;
  *
  * @author: Jose Loguercio <jose.loguercio@beeznest.com>
  *
- * @package chamilo.badge
  */
 require_once __DIR__.'/../inc/global.inc.php';
 
@@ -37,7 +36,7 @@ $skillUserRepo = $entityManager->getRepository('ChamiloCoreBundle:SkillRelUser')
 $skillLevels = api_get_configuration_value('skill_levels_names');
 
 $skillsOptions = ['' => get_lang('Select')];
-$acquiredLevel = ['' => get_lang('None')];
+$acquiredLevel = ['' => get_lang('none')];
 $formDefaultValues = [];
 
 if (empty($skillLevels)) {
@@ -154,8 +153,8 @@ $disableList = [];
 $currentUrl = api_get_self().'?user='.$userId.'&current='.$currentLevel;
 
 $form = new FormValidator('assign_skill', 'POST', $currentUrl);
-$form->addHeader(get_lang('AssignSkill'));
-$form->addText('user_name', get_lang('UserName'), false);
+$form->addHeader(get_lang('Assign skill'));
+$form->addText('user_name', get_lang('Username'), false);
 
 $levelName = get_lang('Skill');
 if (!empty($skillLevels)) {
@@ -191,7 +190,7 @@ if (!empty($skillIdFromGet)) {
             $skillsOptions[$child['id']] = $child['data']['name'];
         }
 
-        $levelName = get_lang('SubSkill');
+        $levelName = get_lang('Sub-skill');
         if (!empty($skillLevels)) {
             if (isset($skillLevels['levels'][$counter + 2])) {
                 $levelName = get_lang($skillLevels['levels'][$counter + 2]);
@@ -227,20 +226,20 @@ $currentUrl = api_get_self().'?user='.$userId.'&current='.$currentLevel.'&sub_sk
 $form->addHidden('sub_skill_list', $subSkillListToString);
 $form->addHidden('user', $user->getId());
 $form->addHidden('id', $skillId);
-$form->addRule('skill', get_lang('ThisFieldIsRequired'), 'required');
+$form->addRule('skill', get_lang('Required field'), 'required');
 
 $showLevels = api_get_configuration_value('hide_skill_levels') === false;
 
 if ($showLevels) {
-    $form->addSelect('acquired_level', get_lang('AcquiredLevel'), $acquiredLevel);
-    //$form->addRule('acquired_level', get_lang('ThisFieldIsRequired'), 'required');
+    $form->addSelect('acquired_level', get_lang('Level acquired'), $acquiredLevel);
+    //$form->addRule('acquired_level', get_lang('Required field'), 'required');
 }
 
 $form->addTextarea('argumentation', get_lang('Argumentation'), ['rows' => 6]);
-$form->addRule('argumentation', get_lang('ThisFieldIsRequired'), 'required');
+$form->addRule('argumentation', get_lang('Required field'), 'required');
 $form->addRule(
     'argumentation',
-    sprintf(get_lang('ThisTextShouldBeAtLeastXCharsLong'), 10),
+    sprintf(get_lang('This text should be at least %s characters long'), 10),
     'mintext',
     10
 );
@@ -264,7 +263,7 @@ if ($form->validate()) {
 
     if (!$skill) {
         Display::addFlash(
-            Display::return_message(get_lang('SkillNotFound'), 'error')
+            Display::return_message(get_lang('Skill not found'), 'error')
         );
 
         header('Location: '.api_get_self().'?'.$currentUrl);
@@ -275,7 +274,7 @@ if ($form->validate()) {
         Display::addFlash(
             Display::return_message(
                 sprintf(
-                    get_lang('TheUserXHasAlreadyAchievedTheSkillY'),
+                    get_lang('The user %s has already achieved the skill %s'),
                     UserManager::formatUserFullName($user),
                     $skill->getName()
                 ),
@@ -320,12 +319,12 @@ if ($form->validate()) {
             if ($counter >= $requiredSkills) {
                 $bossList = UserManager::getStudentBossList($userId);
                 if (!empty($bossList)) {
-                    Display::addFlash(Display::return_message(get_lang('MessageSent')));
+                    Display::addFlash(Display::return_message(get_lang('Message Sent')));
                     $url = api_get_path(WEB_CODE_PATH).'badge/assign.php?user='.$userId.'&id='.$parentId;
                     $link = Display::url($url, $url);
-                    $subject = get_lang('StudentHadEnoughSkills');
+                    $subject = get_lang('A student has obtained the number of sub-skills needed to validate the mother skill.');
                     $message = sprintf(
-                        get_lang('StudentXHadEnoughSkillsToGetSkillXToAssignClickHereX'),
+                        get_lang('Learner %s has enough sub-skill to get skill %s. To assign this skill it is possible to go here : %s'),
                         UserManager::formatUserFullName($user),
                         $parentData['name'],
                         $link
@@ -346,7 +345,7 @@ if ($form->validate()) {
     Display::addFlash(
         Display::return_message(
             sprintf(
-                get_lang('SkillXAssignedToUserY'),
+                get_lang('The skill %s has been assigned to user %s'),
                 $skill->getName(),
                 UserManager::formatUserFullName($user)
             ),
@@ -364,17 +363,17 @@ $form->freeze(['user_name']);
 if (api_is_drh()) {
     $interbreadcrumb[] = [
         'url' => api_get_path(WEB_CODE_PATH).'mySpace/index.php',
-        "name" => get_lang('MySpace'),
+        "name" => get_lang('Reporting'),
     ];
     if ($user->getStatus() == COURSEMANAGER) {
         $interbreadcrumb[] = [
             "url" => api_get_path(WEB_CODE_PATH).'mySpace/teachers.php',
-            'name' => get_lang('Teachers'),
+            'name' => get_lang('Trainers'),
         ];
     } else {
         $interbreadcrumb[] = [
             "url" => api_get_path(WEB_CODE_PATH).'mySpace/student.php',
-            'name' => get_lang('MyStudents'),
+            'name' => get_lang('My learners'),
         ];
     }
     $interbreadcrumb[] = [
@@ -384,11 +383,11 @@ if (api_is_drh()) {
 } else {
     $interbreadcrumb[] = [
         'url' => api_get_path(WEB_CODE_PATH).'admin/index.php',
-        'name' => get_lang('PlatformAdmin'),
+        'name' => get_lang('Administration'),
     ];
     $interbreadcrumb[] = [
         'url' => api_get_path(WEB_CODE_PATH).'admin/user_list.php',
-        'name' => get_lang('UserList'),
+        'name' => get_lang('User list'),
     ];
     $interbreadcrumb[] = [
         'url' => api_get_path(WEB_CODE_PATH).'admin/user_information.php?user_id='.$userId,
@@ -418,6 +417,6 @@ $(function() {
 });
 </script>';
 
-$template = new Template(get_lang('AddSkill'));
+$template = new Template(get_lang('Add skill'));
 $template->assign('content', $form->returnForm());
 $template->display_one_col_template();
diff --git a/main/badge/criteria.php b/main/badge/criteria.php
index 13e9ceb28c..847ca27262 100644
--- a/main/badge/criteria.php
+++ b/main/badge/criteria.php
@@ -42,7 +42,7 @@ if ($skill) {
 }
 
 Display::addFlash(
-    Display::return_message(get_lang('SkillNotFound'), 'error')
+    Display::return_message(get_lang('Skill not found'), 'error')
 );
 
 header('Location: '.api_get_path(WEB_PATH));
diff --git a/main/badge/issued.php b/main/badge/issued.php
index 60ae3eb632..be3d143d7b 100644
--- a/main/badge/issued.php
+++ b/main/badge/issued.php
@@ -28,7 +28,7 @@ $skillIssue = $entityManager->find('ChamiloCoreBundle:SkillRelUser', $issue);
 if (!$skillIssue) {
     Display::addFlash(
         Display::return_message(
-            get_lang('SkillNotFound'),
+            get_lang('Skill not found'),
             'warning'
         )
     );
@@ -44,7 +44,7 @@ $skill = $skillIssue->getSkill();
 
 if (!$user || !$skill) {
     Display::addFlash(
-        Display::return_message(get_lang('NoResults'), 'warning')
+        Display::return_message(get_lang('No results found'), 'warning')
     );
 
     header('Location: '.api_get_path(WEB_PATH));
@@ -67,7 +67,7 @@ $skillInfo = [
     'courses' => [],
 ];
 
-$titleContent = sprintf(get_lang('IHaveObtainedSkillXOnY'), $skillInfo['name'], api_get_setting('siteName'));
+$titleContent = sprintf(get_lang('I have achieved skill %s on %s'), $skillInfo['name'], api_get_setting('siteName'));
 
 // Open Graph Markup
 $htmlHeadXtra[] = "
@@ -84,7 +84,7 @@ $allowExport = $currentUser ? $currentUser->getId() === $user->getId() : false;
 
 $allowComment = $currentUser ? Skill::userCanAddFeedbackToUser($currentUser, $user) : false;
 $skillIssueDate = api_get_local_time($skillIssue->getAcquiredSkillAt());
-$currentSkillLevel = get_lang('NoLevelAcquiredYet');
+$currentSkillLevel = get_lang('No level acquired yet');
 if ($skillIssue->getAcquiredLevel()) {
     $currentSkillLevel = $skillLevelRepo->find(['id' => $skillIssue->getAcquiredLevel()])->getName();
 }
@@ -176,7 +176,7 @@ $allowToEdit = Skill::isAllowed($user->getId(), false);
 
 if ($showLevels && $allowToEdit) {
     $formAcquiredLevel = new FormValidator('acquired_level');
-    $formAcquiredLevel->addSelect('acquired_level', get_lang('AcquiredLevel'), $acquiredLevel);
+    $formAcquiredLevel->addSelect('acquired_level', get_lang('Level acquired'), $acquiredLevel);
     $formAcquiredLevel->addHidden('user', $skillIssue->getUser()->getId());
     $formAcquiredLevel->addHidden('issue', $skillIssue->getId());
     $formAcquiredLevel->addButtonSave(get_lang('Save'));
@@ -196,17 +196,17 @@ if ($showLevels && $allowToEdit) {
 }
 
 $form = new FormValidator('comment');
-$form->addTextarea('comment', get_lang('NewComment'), ['rows' => 4]);
+$form->addTextarea('comment', get_lang('New comment'), ['rows' => 4]);
 $form->applyFilter('comment', 'trim');
-$form->addRule('comment', get_lang('ThisFieldIsRequired'), 'required');
+$form->addRule('comment', get_lang('Required field'), 'required');
 $form->addSelect(
     'value',
-    [get_lang('Value'), get_lang('RateTheSkillInPractice')],
+    [get_lang('Value'), get_lang('On a grade of 1 to 10, how well did you observe that this person could put this skill in practice?')],
     ['-', 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
 );
 $form->addHidden('user', $skillIssue->getUser()->getId());
 $form->addHidden('issue', $skillIssue->getId());
-$form->addButtonSend(get_lang('Send'));
+$form->addButtonSend(get_lang('Send message'));
 
 if ($form->validate() && $allowComment && $allowToEdit) {
     $values = $form->exportValues();
@@ -277,7 +277,7 @@ if ($allowExport) {
     }
 }
 
-$template = new Template(get_lang('IssuedBadgeInformation'));
+$template = new Template(get_lang('Issued badge information'));
 $template->assign('issue_info', $skillIssueInfo);
 $template->assign('allow_comment', $allowComment);
 $template->assign('allow_export', $allowExport);
@@ -297,6 +297,6 @@ $template->assign('badge_error', $badgeInfoError);
 $template->assign('personal_badge', $personalBadge);
 $template->assign('show_level', $showLevels);
 $content = $template->fetch($template->get_template('skill/issued.tpl'));
-$template->assign('header', get_lang('IssuedBadgeInformation'));
+$template->assign('header', get_lang('Issued badge information'));
 $template->assign('content', $content);
 $template->display_one_col_template();
diff --git a/main/badge/issued_all.php b/main/badge/issued_all.php
index 43bef8598f..346741fa97 100644
--- a/main/badge/issued_all.php
+++ b/main/badge/issued_all.php
@@ -30,7 +30,7 @@ $currentUserId = api_get_user_id();
 
 if (!$user || !$skill) {
     Display::addFlash(
-        Display::return_message(get_lang('NoResults'), 'error')
+        Display::return_message(get_lang('No results found'), 'error')
     );
 
     header('Location: '.api_get_path(WEB_PATH));
@@ -68,7 +68,7 @@ foreach ($userSkills as $index => $skillIssue) {
     $allowDownloadExport = $currentUser ? $currentUser->getId() === $user->getId() : false;
     $allowComment = $currentUser ? Skill::userCanAddFeedbackToUser($currentUser, $user) : false;
     $skillIssueDate = api_get_local_time($skillIssue->getAcquiredSkillAt());
-    $currentSkillLevel = get_lang('NoLevelAcquiredYet');
+    $currentSkillLevel = get_lang('No level acquired yet');
     if ($skillIssue->getAcquiredLevel()) {
         $currentSkillLevel = $skillLevelRepo->find(['id' => $skillIssue->getAcquiredLevel()])->getName();
     }
@@ -160,7 +160,7 @@ foreach ($userSkills as $index => $skillIssue) {
         'post',
         SkillRelUserManager::getIssueUrlAll($skillIssue)
     );
-    $formAcquiredLevel->addSelect('acquired_level', get_lang('AcquiredLevel'), $acquiredLevel);
+    $formAcquiredLevel->addSelect('acquired_level', get_lang('Level acquired'), $acquiredLevel);
     $formAcquiredLevel->addHidden('user', $skillIssue->getUser()->getId());
     $formAcquiredLevel->addHidden('issue', $skillIssue->getId());
     $formAcquiredLevel->addButtonSend(get_lang('Save'));
@@ -183,17 +183,17 @@ foreach ($userSkills as $index => $skillIssue) {
         'post',
         SkillRelUserManager::getIssueUrlAll($skillIssue)
     );
-    $form->addTextarea('comment', get_lang('NewComment'), ['rows' => 4]);
+    $form->addTextarea('comment', get_lang('New comment'), ['rows' => 4]);
     $form->applyFilter('comment', 'trim');
-    $form->addRule('comment', get_lang('ThisFieldIsRequired'), 'required');
+    $form->addRule('comment', get_lang('Required field'), 'required');
     $form->addSelect(
         'value',
-        [get_lang('Value'), get_lang('RateTheSkillInPractice')],
+        [get_lang('Value'), get_lang('On a grade of 1 to 10, how well did you observe that this person could put this skill in practice?')],
         ['-', 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
     );
     $form->addHidden('user', $skillIssue->getUser()->getId());
     $form->addHidden('issue', $skillIssue->getId());
-    $form->addButtonSend(get_lang('Send'));
+    $form->addButtonSend(get_lang('Send message'));
 
     if ($form->validate() && $allowComment) {
         $values = $form->exportValues();
@@ -273,7 +273,7 @@ foreach ($userSkills as $index => $skillIssue) {
     $allUserBadges[$index]['personal_badge'] = $personalBadge;
 }
 
-$template = new Template(get_lang('IssuedBadgeInformation'));
+$template = new Template(get_lang('Issued badge information'));
 $template->assign('user_badges', $allUserBadges);
 $template->assign('show_level', api_get_configuration_value('hide_skill_levels') == false);
 
@@ -281,6 +281,6 @@ $content = $template->fetch(
     $template->get_template('skill/issued_all.tpl')
 );
 
-$template->assign('header', get_lang('IssuedBadgeInformation'));
+$template->assign('header', get_lang('Issued badge information'));
 $template->assign('content', $content);
 $template->display_one_col_template();
diff --git a/main/blog/blog.php b/main/blog/blog.php
index 8b275ae983..87c17f9125 100755
--- a/main/blog/blog.php
+++ b/main/blog/blog.php
@@ -1,10 +1,10 @@
 <?php
 /* For licensing terms, see /license.txt */
+
 /**
  * BLOG HOMEPAGE
  * This file takes care of all blog navigation and displaying.
  *
- * @package chamilo.blogs
  */
 require_once __DIR__.'/../inc/global.inc.php';
 
@@ -49,7 +49,7 @@ if (!empty($_POST['edit_post_submit'])) {
         $blog_id
     );
     Display::addFlash(
-        Display::return_message(get_lang('BlogEdited'), 'success')
+        Display::return_message(get_lang('The project has been edited.'), 'success')
     );
 }
 
@@ -65,7 +65,7 @@ if (!empty($_POST['new_task_submit'])) {
     );
 
     Display::addFlash(
-        Display::return_message(get_lang('TaskCreated'), 'success')
+        Display::return_message(get_lang('The task has been created'), 'success')
     );
 }
 
@@ -81,7 +81,7 @@ if (isset($_POST['edit_task_submit'])) {
         $_POST['task_color']
     );
     Display::addFlash(
-        Display::return_message(get_lang('TaskEdited'), 'success')
+        Display::return_message(get_lang('The task has been edited.'), 'success')
     );
 }
 
@@ -93,7 +93,7 @@ if (!empty($_POST['assign_task_submit'])) {
         $_POST['task_day']
     );
     Display::addFlash(
-        Display::return_message(get_lang('TaskAssigned'), 'success')
+        Display::return_message(get_lang('The task has been assigned.'), 'success')
     );
 }
 
@@ -108,7 +108,7 @@ if (isset($_POST['assign_task_edit_submit'])) {
         $_POST['old_target_date']
     );
     Display::addFlash(
-        Display::return_message(get_lang('AssignedTaskEdited'), 'success')
+        Display::return_message(get_lang('AssignedThe task has been edited.'), 'success')
     );
 }
 if (!empty($_POST['register'])) {
@@ -128,7 +128,7 @@ if (!empty($_POST['unregister'])) {
 if (!empty($_GET['register'])) {
     Blog::subscribeUser((int) $_GET['blog_id'], (int) $_GET['user_id']);
     Display::addFlash(
-        Display::return_message(get_lang('UserRegistered'), 'success')
+        Display::return_message(get_lang('The user has been registered'), 'success')
     );
     $flag = 1;
 }
@@ -140,14 +140,14 @@ if (isset($_GET['action']) && $_GET['action'] == 'manage_tasks') {
     if (isset($_GET['do']) && $_GET['do'] == 'delete') {
         Blog::deleteTask($blog_id, (int) $_GET['task_id']);
         Display::addFlash(
-            Display::return_message(get_lang('TaskDeleted'), 'success')
+            Display::return_message(get_lang('The task has been deleted.'), 'success')
         );
     }
 
     if (isset($_GET['do']) && $_GET['do'] == 'delete_assignment') {
         Blog::deleteAssignedTask($blog_id, intval($_GET['task_id']), intval($_GET['user_id']));
         Display::addFlash(
-            Display::return_message(get_lang('TaskAssignmentDeleted'), 'success')
+            Display::return_message(get_lang('The task assignment has been deleted.'), 'success')
         );
     }
 }
@@ -159,11 +159,11 @@ if (isset($_GET['action']) && $_GET['action'] == 'view_post') {
         if (api_is_allowed('BLOG_'.$blog_id, 'article_comments_delete', $task_id)) {
             Blog::deleteComment($blog_id, (int) $_GET['post_id'], (int) $_GET['comment_id']);
             Display::addFlash(
-                Display::return_message(get_lang('CommentDeleted'), 'success')
+                Display::return_message(get_lang('The comment has been deleted.'), 'success')
             );
         } else {
             Display::addFlash(
-                Display::return_message(get_lang('ActionNotAllowed'), 'error')
+                Display::return_message(get_lang('Action not allowed'), 'error')
             );
         }
     }
@@ -173,11 +173,11 @@ if (isset($_GET['action']) && $_GET['action'] == 'view_post') {
             Blog::deletePost($blog_id, (int) $_GET['article_id']);
             $action = ''; // Article is gone, go to blog home
             Display::addFlash(
-                Display::return_message(get_lang('BlogDeleted'), 'success')
+                Display::return_message(get_lang('The project has been deleted.'), 'success')
             );
         } else {
             Display::addFlash(
-                Display::return_message(get_lang('ActionNotAllowed'), 'error')
+                Display::return_message(get_lang('Action not allowed'), 'error')
             );
         }
     }
@@ -186,7 +186,7 @@ if (isset($_GET['action']) && $_GET['action'] == 'view_post') {
             if (api_is_allowed('BLOG_'.$blog_id, 'article_rate')) {
                 Blog::addRating('post', $blog_id, (int) $_GET['post_id'], (int) $_GET['rating']);
                 Display::addFlash(
-                    Display::return_message(get_lang('RatingAdded'), 'success')
+                    Display::return_message(get_lang('A rating has been added.'), 'success')
                 );
             }
         }
@@ -194,7 +194,7 @@ if (isset($_GET['action']) && $_GET['action'] == 'view_post') {
             if (api_is_allowed('BLOG_'.$blog_id, 'article_comments_add')) {
                 Blog::addRating('comment', $blog_id, (int) $_GET['comment_id'], (int) $_GET['rating']);
                 Display::addFlash(
-                    Display::return_message(get_lang('RatingAdded'), 'success')
+                    Display::return_message(get_lang('A rating has been added.'), 'success')
                 );
             }
         }
@@ -207,25 +207,25 @@ if (isset($_GET['action']) && $_GET['action'] == 'view_post') {
 // Set breadcrumb
 switch ($action) {
     case 'new_post':
-        $nameTools = get_lang('NewPost');
+        $nameTools = get_lang('New task');
         break;
     case 'view_post':
         $nameTools = '';
         break;
     case 'manage_tasks':
-        $nameTools = get_lang('TaskManager');
+        $nameTools = get_lang('Roles management');
         break;
     case 'manage_members':
-        $nameTools = get_lang('MemberManager');
+        $nameTools = get_lang('Users management');
         break;
     case 'manage_rights':
-        $nameTools = get_lang('RightsManager');
+        $nameTools = get_lang('Users rights management');
         break;
     case 'view_search_result':
-        $nameTools = get_lang('SearchResults');
+        $nameTools = get_lang('Search results');
         break;
     case 'execute_task':
-        $nameTools = get_lang('ExecuteThisTask');
+        $nameTools = get_lang('A task for me');
         break;
     default:
         $nameTools = Blog::getBlogTitle($blog_id);
@@ -241,19 +241,19 @@ $actionsLeft = Display::url(
 );
 if (api_is_allowed('BLOG_'.$blog_id, 'article_add')) {
     $actionsLeft .= Display::url(
-        Display::return_icon('new_article.png', get_lang('NewPost'), '', ICON_SIZE_MEDIUM),
+        Display::return_icon('new_article.png', get_lang('New task'), '', ICON_SIZE_MEDIUM),
         api_get_self().'?action=new_post&blog_id='.$blog_id.'&'.api_get_cidreq()
     );
 }
 if (api_is_allowed('BLOG_'.$blog_id, 'task_management')) {
     $actionsLeft .= Display::url(
-        Display::return_icon('blog_tasks.png', get_lang('TaskManager'), '', ICON_SIZE_MEDIUM),
+        Display::return_icon('blog_tasks.png', get_lang('Roles management'), '', ICON_SIZE_MEDIUM),
         api_get_self().'?action=manage_tasks&blog_id='.$blog_id.'&'.api_get_cidreq()
     );
 }
 if (api_is_allowed('BLOG_'.$blog_id, 'member_management')) {
     $actionsLeft .= Display::url(
-        Display::return_icon('blog_admin_users.png', get_lang('MemberManager'), '', ICON_SIZE_MEDIUM),
+        Display::return_icon('blog_admin_users.png', get_lang('Users management'), '', ICON_SIZE_MEDIUM),
         api_get_self().'?action=manage_members&blog_id='.$blog_id.'&'.api_get_cidreq()
     );
 }
@@ -419,7 +419,7 @@ switch ($action) {
         if (isset($_GET['filter']) && !empty($_GET['filter'])) {
             $listArticles = Blog::getDailyResults($blog_id, Database::escape_string($_GET['filter']));
             $dateSearch = api_format_date($_GET['filter'], DATE_FORMAT_LONG);
-            $titleSearch = get_lang('PostsOf').' '.$dateSearch;
+            $titleSearch = get_lang('Tasks by').' '.$dateSearch;
             $tpl->assign('search', $titleSearch);
             $tpl->assign('articles', $listArticles);
             $blogLayout = $tpl->get_template('blog/blog.tpl');
diff --git a/main/blog/blog_admin.php b/main/blog/blog_admin.php
index 5fa076f16c..8053cd05d8 100755
--- a/main/blog/blog_admin.php
+++ b/main/blog/blog_admin.php
@@ -4,8 +4,6 @@
 /**
  * BLOG HOMEPAGE
  * This file takes care of all blog navigation and displaying.
- *
- * @package chamilo.blogs
  */
 require_once __DIR__.'/../inc/global.inc.php';
 $current_course_tool = TOOL_BLOGS;
@@ -23,7 +21,7 @@ $origin = api_get_origin();
 $action = isset($_GET['action']) ? $_GET['action'] : '';
 
 if (api_is_allowed_to_edit()) {
-    $nameTools = get_lang('blog_management');
+    $nameTools = get_lang('Project management');
 
     // showing the header if we are not in the learning path, if we are in
     // the learning path, we do not include the banner so we have to explicitly
@@ -35,38 +33,38 @@ if (api_is_allowed_to_edit()) {
         ];
         $my_url = '';
         if ($action == 'add') {
-            $current_section = get_lang('AddBlog');
+            $current_section = get_lang('Create a new project');
             $my_url = 'action=add';
         } elseif ($action == 'edit') {
-            $current_section = get_lang('EditBlog');
+            $current_section = get_lang('Edit a project');
             $my_url = 'action=edit&amp;blog_id='.Security::remove_XSS($_GET['blog_id']);
         }
         Display::display_header('');
     }
     echo '<div class="actions">';
     echo "<a href='".api_get_self()."?".api_get_cidreq()."&action=add'>",
-        Display::return_icon('new_blog.png', get_lang('AddBlog'), '', ICON_SIZE_MEDIUM)."</a>";
+        Display::return_icon('new_blog.png', get_lang('Create a new project'), '', ICON_SIZE_MEDIUM)."</a>";
     echo '</div>';
 
     if (!empty($_POST['new_blog_submit']) && !empty($_POST['blog_name'])) {
         if (isset($_POST['blog_name'])) {
             Blog::addBlog($_POST['blog_name'], $_POST['blog_subtitle']);
-            echo Display::return_message(get_lang('BlogStored'), 'confirmation');
+            echo Display::return_message(get_lang('The project has been added.'), 'confirmation');
         }
     }
     if (!empty($_POST['edit_blog_submit']) && !empty($_POST['blog_name'])) {
         if (strlen(trim($_POST['blog_name'])) > 0) {
             Blog::editBlog($_POST['blog_id'], $_POST['blog_name'], $_POST['blog_subtitle']);
-            echo Display::return_message(get_lang('BlogEdited'), 'confirmation');
+            echo Display::return_message(get_lang('The project has been edited.'), 'confirmation');
         }
     }
     if (isset($_GET['action']) && $_GET['action'] == 'visibility') {
         Blog::changeBlogVisibility(intval($_GET['blog_id']));
-        echo Display::return_message(get_lang('VisibilityChanged'), 'confirmation');
+        echo Display::return_message(get_lang('The visibility has been changed.'), 'confirmation');
     }
     if (isset($_GET['action']) && $_GET['action'] == 'delete') {
         Blog::deleteBlog(intval($_GET['blog_id']));
-        echo Display::return_message(get_lang('BlogDeleted'), 'confirmation');
+        echo Display::return_message(get_lang('The project has been deleted.'), 'confirmation');
     }
 
     if (isset($_GET['action']) && $_GET['action'] == 'add') {
@@ -85,7 +83,7 @@ if (api_is_allowed_to_edit()) {
         if (!$_POST || (!empty($_POST) && (empty($_POST['edit_blog_submit']) || empty($_POST['blog_name'])))) {
             // if there is post data there is certainly an error in the form
             if ($_POST) {
-                echo Display::return_message(get_lang('FormHasErrorsPleaseComplete'), 'error');
+                echo Display::return_message(get_lang('The form contains incorrect or incomplete data. Please check your input.'), 'error');
             }
             Blog::displayBlogEditForm(intval($_GET['blog_id']));
         }
diff --git a/main/calendar/agenda.php b/main/calendar/agenda.php
index 8e58c25ac5..cc956f26b3 100755
--- a/main/calendar/agenda.php
+++ b/main/calendar/agenda.php
@@ -161,10 +161,10 @@ if ($allowToEdit) {
                         $values['users_to_send']
                     );
                 }
-                $message = Display::return_message(get_lang('AddSuccess'), 'confirmation');
+                $message = Display::return_message(get_lang('Event added'), 'confirmation');
                 if ($sendEmail) {
                     $message .= Display::return_message(
-                        get_lang('AdditionalMailWasSentToSelectedUsers'),
+                        get_lang('Additionally, a new announcement has been created and sent to selected users'),
                         'confirmation'
                     );
                 }
@@ -219,7 +219,7 @@ if ($allowToEdit) {
                         $comment
                     );
 
-                    $message = Display::return_message(get_lang('Updated'), 'confirmation');
+                    $message = Display::return_message(get_lang('Update successful'), 'confirmation');
                     Display::addFlash($message);
                     header("Location: $agendaUrl");
                     exit;
@@ -265,7 +265,7 @@ if ($allowToEdit) {
                     }
                 }
 
-                $message = Display::return_message(get_lang('Updated'), 'confirmation');
+                $message = Display::return_message(get_lang('Update successful'), 'confirmation');
                 Display::addFlash($message);
                 header("Location: $agendaUrl");
                 exit;
@@ -283,9 +283,9 @@ if ($allowToEdit) {
 
                 if (in_array($ext, ['ics', 'ical', 'icalendar', 'ifb'])) {
                     $content = $agenda->importEventFile($course_info, $_FILES['ical_import']);
-                    $message = Display::return_message(get_lang('AddSuccess'));
+                    $message = Display::return_message(get_lang('Event added'));
                 } else {
-                    $message = Display::return_message(get_lang('IsNotiCalFormatFile'), 'error');
+                    $message = Display::return_message(get_lang('This file is not in iCal format'), 'error');
                 }
                 Display::addFlash($message);
                 $url = api_get_self().'?action=importical&type='.$agenda->type;
@@ -313,7 +313,7 @@ if (!empty($group_id)) {
     ];
     $interbreadcrumb[] = [
         "url" => api_get_path(WEB_CODE_PATH)."group/group_space.php?".api_get_cidreq(),
-        "name" => get_lang('GroupSpace').' '.$group_properties['name'],
+        "name" => get_lang('Group area').' '.$group_properties['name'],
     ];
 }
 if (!empty($actionName)) {
diff --git a/main/calendar/agenda_js.php b/main/calendar/agenda_js.php
index cb6d054c5b..9082e8835a 100755
--- a/main/calendar/agenda_js.php
+++ b/main/calendar/agenda_js.php
@@ -62,7 +62,7 @@ if (!empty($group_id)) {
     ];
     $interbreadcrumb[] = [
         "url" => api_get_path(WEB_CODE_PATH)."group/group_space.php?".api_get_cidreq(),
-        "name" => get_lang('GroupSpace').' '.$group_properties['name'],
+        "name" => get_lang('Group area').' '.$group_properties['name'],
     ];
 }
 
@@ -147,7 +147,7 @@ $export_icon_high = Display::return_icon(
 
 $tpl->assign(
     'export_ical_confidential_icon',
-    Display::return_icon($export_icon_high, get_lang('ExportiCalConfidential'))
+    Display::return_icon($export_icon_high, get_lang('Export in iCal format as confidential event'))
 );
 
 $actions = $agenda->displayActions('calendar', $userId);
@@ -161,7 +161,7 @@ $type_event_class = $type.'_event';
 $type_label = get_lang(ucfirst($type).'Calendar');
 if ($type == 'course' && !empty($group_id)) {
     $type_event_class = 'group_event';
-    $type_label = get_lang('GroupCalendar');
+    $type_label = get_lang('Agenda');
 }
 
 $defaultView = api_get_setting('default_calendar_view');
@@ -175,7 +175,7 @@ $tpl->assign('default_view', $defaultView);
 
 if ($type == 'course' && !empty($session_id)) {
     $type_event_class = 'session_event';
-    $type_label = get_lang('SessionCalendar');
+    $type_label = get_lang('Session calendar');
 }
 
 $agendaColors = array_merge(
@@ -273,7 +273,7 @@ $form->addHtmlEditor(
 
 if ($agenda->type === 'course') {
     $form->addHtml('<div id="add_as_announcement_div" style="display: none">');
-    $form->addElement('checkbox', 'add_as_annonuncement', null, get_lang('AddAsAnnouncement'));
+    $form->addElement('checkbox', 'add_as_annonuncement', null, get_lang('Add as an announcement'));
     $form->addHtml('</div>');
     $form->addElement('textarea', 'comment', get_lang('Comment'), ['id' => 'comment']);
 }
diff --git a/main/calendar/agenda_list.php b/main/calendar/agenda_list.php
index cad5594c9a..b8c7df6810 100755
--- a/main/calendar/agenda_list.php
+++ b/main/calendar/agenda_list.php
@@ -35,7 +35,7 @@ if (!empty($groupId)) {
     ];
     $interbreadcrumb[] = [
         'url' => api_get_path(WEB_CODE_PATH)."group/group_space.php?".api_get_cidreq(),
-        'name' => get_lang('GroupSpace').' '.$groupProperties['name'],
+        'name' => get_lang('Group area').' '.$groupProperties['name'],
     ];
 }
 
diff --git a/main/calendar/ical_export.php b/main/calendar/ical_export.php
index 86408d4f0e..f167c23dd1 100755
--- a/main/calendar/ical_export.php
+++ b/main/calendar/ical_export.php
@@ -17,7 +17,7 @@ $this_section = SECTION_MYAGENDA;
 api_block_anonymous_users();
 
 // setting the name of the tool
-$nameTools = get_lang('MyAgenda');
+$nameTools = get_lang('Personal agenda');
 
 // the variables for the days and the months
 // Defining the shorts for the days
diff --git a/main/calendar/planification.php b/main/calendar/planification.php
index 6f2ee335bc..546235d531 100644
--- a/main/calendar/planification.php
+++ b/main/calendar/planification.php
@@ -44,7 +44,7 @@ $colors = ChamiloApi::getColorPalette(false, true, count($sessions));
 $agenda = new Agenda('personal');
 $actions = $agenda->displayActions('list', $userId);
 
-$toolName = get_lang('SessionsPlanCalendar');
+$toolName = get_lang('Sessions plan calendar');
 
 $interbreadcrumb[] = [
     'url' => api_get_path(WEB_CODE_PATH).'calendar/agenda_js.php?type=personal',
diff --git a/main/course_description/add.php b/main/course_description/add.php
index 122733b0dc..472f05d7f9 100755
--- a/main/course_description/add.php
+++ b/main/course_description/add.php
@@ -17,12 +17,12 @@ $categories = [];
 foreach ($default_description_titles as $id => $title) {
     $categories[$id] = $title;
 }
-$categories[ADD_BLOCK] = get_lang('NewBloc');
+$categories[ADD_BLOCK] = get_lang('Other');
 
 $i = 1;
 echo '<div class="actions" style="margin-bottom:30px">';
 echo '<a href="index.php?'.api_get_cidreq().'">'.
-    Display::return_icon('back.png', get_lang('BackTo').' '.get_lang('ToolCourseDescription'), '', ICON_SIZE_MEDIUM).
+    Display::return_icon('back.png', get_lang('Back to').' '.get_lang('Course description'), '', ICON_SIZE_MEDIUM).
     '</a>';
 ksort($categories);
 foreach ($categories as $id => $title) {
@@ -41,7 +41,7 @@ echo '</div>';
 // error messages
 if (isset($error) && intval($error) == 1) {
     echo Display::return_message(
-        get_lang('FormHasErrorsPleaseComplete'),
+        get_lang('The form contains incorrect or incomplete data. Please check your input.'),
         'error',
         false
     );
@@ -89,7 +89,7 @@ $form->addButtonCreate(get_lang('Save'));
 
 // display default questions
 if (isset($question[$description_type])) {
-    $message = '<strong>'.get_lang('QuestionPlan').'</strong><br />';
+    $message = '<strong>'.get_lang('Help').'</strong><br />';
     $message .= $question[$description_type];
     echo Display::return_message($message, 'normal', false);
 }
diff --git a/main/course_description/course_description_controller.php b/main/course_description/course_description_controller.php
index 597e0239a5..66f8d1f7e7 100644
--- a/main/course_description/course_description_controller.php
+++ b/main/course_description/course_description_controller.php
@@ -56,7 +56,7 @@ class CourseDescriptionController
         global $htmlHeadXtra;
         $htmlHeadXtra[] = "<script>
         function confirmation(name) {
-            if (confirm(\" ".trim(get_lang('AreYouSureToDeleteJS'))." \"+name+\"?\")) {
+            if (confirm(\" ".trim(get_lang('Are you sure to delete'))." \"+name+\"?\")) {
                 return true;
             } else {
                 return false;
@@ -84,7 +84,7 @@ class CourseDescriptionController
             foreach ($data['default_description_titles'] as $id => $title) {
                 $categories[$id] = $title;
             }
-            $categories[ADD_BLOCK] = get_lang('NewBloc');
+            $categories[ADD_BLOCK] = get_lang('Other');
             $i = 1;
 
             ksort($categories);
@@ -114,7 +114,7 @@ class CourseDescriptionController
             $actions = Display::toolbarAction('toolbar', [0 => $actionLeft]);
         }
 
-        $tpl = new Template(get_lang('CourseProgram'));
+        $tpl = new Template(get_lang('Description'));
         $tpl->assign('listing', $data);
         $tpl->assign('is_allowed_to_edit', $is_allowed_to_edit);
         $tpl->assign('actions', $actions);
@@ -173,7 +173,7 @@ class CourseDescriptionController
 
                     Display::addFlash(
                         Display::return_message(
-                            get_lang('CourseDescriptionUpdated')
+                            get_lang('The description has been updated')
                         )
                     );
                 }
@@ -266,7 +266,7 @@ class CourseDescriptionController
 
                     Display::addFlash(
                         Display::return_message(
-                            get_lang('CourseDescriptionUpdated')
+                            get_lang('The description has been updated')
                         )
                     );
                 }
@@ -316,7 +316,7 @@ class CourseDescriptionController
             $course_description->set_id($id);
             $course_description->delete();
             Display::addFlash(
-                Display::return_message(get_lang('CourseDescriptionDeleted'))
+                Display::return_message(get_lang('Description has been deleted'))
             );
         }
         $this->listing(false);
diff --git a/main/course_description/edit.php b/main/course_description/edit.php
index 82e16b7f75..aa6da33de2 100755
--- a/main/course_description/edit.php
+++ b/main/course_description/edit.php
@@ -35,12 +35,12 @@ $categories = [];
 foreach ($default_description_titles as $id => $title) {
     $categories[$id] = $title;
 }
-$categories[ADD_BLOCK] = get_lang('NewBloc');
+$categories[ADD_BLOCK] = get_lang('Other');
 
 $i = 1;
 echo '<div class="actions" style="margin-bottom:30px">';
 echo '<a href="index.php?'.api_get_cidreq().'">'.
-        Display::return_icon('back.png', get_lang('BackTo').' '.get_lang('ToolCourseDescription'), '', ICON_SIZE_MEDIUM).
+        Display::return_icon('back.png', get_lang('Back to').' '.get_lang('Course description'), '', ICON_SIZE_MEDIUM).
     '</a>';
 
 ksort($categories);
@@ -59,7 +59,7 @@ echo '</div>';
 
 // error messages
 if (isset($error) && intval($error) == 1) {
-    echo Display::return_message(get_lang('FormHasErrorsPleaseComplete'), 'error', false);
+    echo Display::return_message(get_lang('The form contains incorrect or incomplete data. Please check your input.'), 'error', false);
 }
 
 // default header title form
@@ -117,7 +117,7 @@ $default['description_type'] = $description_type;
 $form->setDefaults($default);
 
 if (isset($question[$description_type])) {
-    $message = '<strong>'.get_lang('QuestionPlan').'</strong><br />';
+    $message = '<strong>'.get_lang('Help').'</strong><br />';
     $message .= $question[$description_type];
     Display::addFlash(Display::return_message($message, 'normal', false));
 }
diff --git a/main/course_description/index.php b/main/course_description/index.php
index 9d00ce6d79..b8e4673b9f 100755
--- a/main/course_description/index.php
+++ b/main/course_description/index.php
@@ -47,9 +47,9 @@ if (isset($_GET['isStudentView']) && $_GET['isStudentView'] == 'true') {
 }
 
 // interbreadcrumb
-$interbreadcrumb[] = ["url" => "index.php?".api_get_cidreq(), "name" => get_lang('CourseProgram')];
+$interbreadcrumb[] = ["url" => "index.php?".api_get_cidreq(), "name" => get_lang('Description')];
 if ($description_type == 1) {
-    $interbreadcrumb[] = ["url" => "#", "name" => get_lang('GeneralDescription')];
+    $interbreadcrumb[] = ["url" => "#", "name" => get_lang('Description')];
 }
 if ($description_type == 2) {
     $interbreadcrumb[] = ["url" => "#", "name" => get_lang('Objectives')];
@@ -61,16 +61,16 @@ if ($description_type == 4) {
     $interbreadcrumb[] = ["url" => "#", "name" => get_lang('Methodology')];
 }
 if ($description_type == 5) {
-    $interbreadcrumb[] = ["url" => "#", "name" => get_lang('CourseMaterial')];
+    $interbreadcrumb[] = ["url" => "#", "name" => get_lang('Course material')];
 }
 if ($description_type == 6) {
-    $interbreadcrumb[] = ["url" => "#", "name" => get_lang('HumanAndTechnicalResources')];
+    $interbreadcrumb[] = ["url" => "#", "name" => get_lang('Resources')];
 }
 if ($description_type == 7) {
     $interbreadcrumb[] = ["url" => "#", "name" => get_lang('Assessment')];
 }
 if ($description_type == 8) {
-    $interbreadcrumb[] = ["url" => "#", "name" => get_lang('ThematicAdvance')];
+    $interbreadcrumb[] = ["url" => "#", "name" => get_lang('Thematic advance')];
 }
 if ($description_type >= 9) {
     $interbreadcrumb[] = ["url" => "#", "name" => get_lang('Others')];
diff --git a/main/course_home/activity.php b/main/course_home/activity.php
index 23ed9f58a8..9d8bc08898 100755
--- a/main/course_home/activity.php
+++ b/main/course_home/activity.php
@@ -21,7 +21,7 @@ if (api_is_platform_admin()) {
     // Show message to confirm that a tool it to be hidden from available tools
     // visibility 0,1->2
     if (!empty($_GET['askDelete'])) {
-        $content .= '<div id="toolhide">'.get_lang('DelLk').'<br />&nbsp;&nbsp;&nbsp;
+        $content .= '<div id="toolhide">'.get_lang('Do you really want to delete this link?').'<br />&nbsp;&nbsp;&nbsp;
             <a href="'.api_get_self().'">'.get_lang('No').'</a>&nbsp;|&nbsp;
             <a href="'.api_get_self().'?delete=yes&id='.$id.'">'.get_lang('Yes').'</a>
         </div>';
@@ -47,7 +47,7 @@ if ($session_id === 0 && api_is_course_admin() && api_is_allowed_to_edit(null, t
     $content .= '<div class="alert alert-success" style="border:0px; margin-top: 0px;padding:0px;">
 		<div class="normal-message" id="id_normal_message" style="display:none">';
     $content .= '<img src="'.api_get_path(WEB_PATH).'main/inc/lib/javascript/indicator.gif"/>&nbsp;&nbsp;';
-    $content .= get_lang('PleaseStandBy');
+    $content .= get_lang('Please stand by...');
     $content .= '</div>
 		<div class="alert alert-success" id="id_confirmation_message" style="display:none"></div>
 	</div>';
@@ -57,7 +57,7 @@ if ($session_id === 0 && api_is_course_admin() && api_is_allowed_to_edit(null, t
     if (api_get_setting('show_session_data') === 'true' && $session_id > 0) {
         $content .= '<div class="row">
             <div class="col-xs-12 col-md-12">
-			<span class="viewcaption">'.get_lang('SessionData').'</span>
+			<span class="viewcaption">'.get_lang('Session\'s data').'</span>
 			<table class="course_activity_home">';
         $content .= CourseHome::show_session_data($session_id);
         $content .= '</table></div></div>';
diff --git a/main/course_home/course_home.php b/main/course_home/course_home.php
index 121450bb0c..3faa07ee8f 100755
--- a/main/course_home/course_home.php
+++ b/main/course_home/course_home.php
@@ -26,8 +26,6 @@ use Fhaculty\Graph\Graph;
  * Show message to confirm that a tools must be hide from available tools
  *
  *   visibility 0,1
- *
- * @package chamilo.course_home
  */
 $use_anonymous = true;
 require_once __DIR__.'/../inc/global.inc.php';
@@ -241,14 +239,14 @@ if (!empty($lpAutoLaunch)) {
 }
 
 if ($showAutoLaunchLpWarning) {
-    $autoLaunchWarning = get_lang('TheLPAutoLaunchSettingIsONStudentsWillBeRedirectToAnSpecificLP');
+    $autoLaunchWarning = get_lang('The learning path auto-launch setting is ON. When learners enter this course, they will be automatically redirected to the learning path marked as auto-launch.');
 }
 
 $forumAutoLaunch = api_get_course_setting('enable_forum_auto_launch');
 if ($forumAutoLaunch == 1) {
     if ($allowAutoLaunchForCourseAdmins) {
         if (empty($autoLaunchWarning)) {
-            $autoLaunchWarning = get_lang('TheForumAutoLaunchSettingIsOnStudentsWillBeRedirectToTheForumTool');
+            $autoLaunchWarning = get_lang('The forum\'s auto-launch setting is on. Students will be redirected to the forum tool when entering this course.');
         }
     } else {
         $url = api_get_path(WEB_CODE_PATH).'forum/index.php?'.api_get_cidreq().'&id_session='.$session_id;
@@ -315,7 +313,7 @@ $documentAutoLaunch = api_get_course_setting('enable_document_auto_launch');
 if ($documentAutoLaunch == 1) {
     if ($allowAutoLaunchForCourseAdmins) {
         if (empty($autoLaunchWarning)) {
-            $autoLaunchWarning = get_lang('TheDocumentAutoLaunchSettingIsOnStudentsWillBeRedirectToTheDocumentTool');
+            $autoLaunchWarning = get_lang('The document auto-launch feature configuration is enabled. Learners will be automatically redirected to document tool.');
         }
     } else {
         // Redirecting to the document