Final update of all languages for 1.5: CS, DE, FR, PT.
Merge pull request #1124 from emanuelschuetze/translations

Final update of all languages for 1.5: CS, DE, FR, PT.
translate lanuage names in global_settings

Fixes: #1118
Merge pull request #1119 from ostcar/translate_languages

translate lanuage names in global_settings