Sale has ended but you can still get this app.
Download En-Bg Offline Translator Pro Now

Official Description

OFFLINE translator and dictionary -- the ultimate foreign language tool when you are abroad! Save on data roaming charges when you travel!

Features:
- fully functional text translation without any internet connection;
- voice output in English (no Bulgarian voice yet);
- dictionary;
- photo translation;

You can test the translation without buying the app at the SkyCode Ltd. Web Site (click the Developer Web Site button).