This app is very accurate and moreover it includes many languages.
Added to that, you can even listen to words pronounciation in the language you desire.
The data is large including many fields such as banks or hotels.
But, I would say, this app lacks of precise useful sentences a stranger would need while abroad.
All in all, it seems to be in a way a must-have, but it might develop a bit more to reach perfection.
dholmer44 about Travel Interpreter Phrasebook