Google Translate gets offline support for 50 languages5
This is a really nice update for anyone who likes to travel, because it means you no longer have to use a data plan to get your translations. So, no more data roaming, or paying for extra data while you travel. It’s also really nice for tablet users who may not have a data connection anyway.
After you update, just check the menu in the top right to download any language packs you may want. If you want to grab Google Translate, it’s available for free in the Google Play Store.
source: Android Blog