DictCC multilingual offline dictionary uses the translation from the dict.cc dictionary.
You are allowed to download the dictionaries from dict.cc for personal usage.
There are dictionaries in many different languages e.g.
Albanian, Bosnian, Bulgarian, Croatian, Czech, Danish, Dutch, Esperanto, Finnish, French, German, Greek, Hungarian, Icelandic, Italian, Latin, Norwegian, Polish, Portuguese, Romanian, Russian, Serbian, Slovak, Spanish, Swedish, Turkish
Once you have imported the dictionary, you can use the App offline without any internet connection.