Unfortunately NCR notation of thislanguage disappeared in a former edit. Hope it won't happen again :-(

lang/ar/moodle.php

@@ -965,7 +965,7 @@ $string['themes'] = '
 $string['themesaved'] = 'تم حفظ الشكل الجديد';
 $string['thischarset'] = 'windows-1256';
 $string['thisdirection'] = 'rtl';
-$string['thislanguage'] = 'عربي';
+$string['thislanguage'] = 'عربي';
 $string['time'] = 'الوقت';
 $string['timezone'] = 'المنطقة الزمنية';
 $string['to'] = 'إلى';

lang/bg/moodle.php

@@ -812,7 +812,7 @@ $string['themes'] = '
 $string['themesaved'] = 'Новата тема е запазена';
 $string['thischarset'] = 'windows-1251';
 $string['thisdirection'] = 'ltr';
-$string['thislanguage'] = 'Български';
+$string['thislanguage'] = 'Български';
 $string['time'] = 'Време';
 $string['timezone'] = 'Часови пояс';
 $string['to'] = 'До';