Fix issue with translation request file builder script

tests/scripts/build_translation_request_file.php

@@ -22,10 +22,11 @@ if (is_file($file)) {
     $referenceTerms = array_merge($referenceTerms, SubLanguageManager::get_all_language_variable_in_file($file,true));
 }
 // get only the array keys (the language variables defined in language files)
-$definedTerms = array_flip(array_keys($referenceTerms));
+$definedTerms = array_keys($referenceTerms);
+//print_r($definedTerms);
 //$referenceTerms = null;
 
-// now get all terms found in all PHP files of Chamilo (this takes some time and memory)
+// now get all terms found in the destination language files of Chamilo (this takes some time and memory)
 $missingTerms = array();
 $nonMissingTerms = array();
 $l = strlen(api_get_path(SYS_PATH));
@@ -33,15 +34,17 @@ $file = $path . $language . '/trad4all.inc.php';
 if (is_file($file)) {
     $nonMissingTerms = array_merge($nonMissingTerms, SubLanguageManager::get_all_language_variable_in_file($file,true));
 }
-$nonMissingTerms = array_flip(array_keys($nonMissingTerms));
+$nonMissingTerms = array_keys($nonMissingTerms);
+//print_r($nonMissingTerms);
 
 $missingTerms = array_diff($definedTerms, $nonMissingTerms);
+//print_r($missingTerms);
 
 echo "<table border='1'>\n";
 echo "<tr><th>Count</th><th>Term</th><th>English</th><th>German</th></tr>";
 $i = 1;
 $countWords = 0;
-foreach ($missingTerms as $term => $value) {
+foreach ($missingTerms as $key => $term) {
     if (isset($referenceTerms[$term])) {
         $trimmed = trim($referenceTerms[$term],';" ');
         $countWords += str_word_count($trimmed);