Japanese Translator - English-Japanese & Japanese-English translator using Google Translate API.It provide a friendly ui.
Text to speech function is aviable
One2one - Description
Ortsbo's one2one is an easy but powerful tool that any traveler can't be without. One2one allows you to have a one device conversation with someone seamlessly in over 50 languages
TravelTranslator - Travel Translator converts text from one of 30+ languages to another.
Some common phrases and map included.
Locale dependent software or hardware keyboard needed for some languages for input
Translator 7, a universal translator for Windows Phone 7 can translate words, phrases, and even sentences in 16 different languages. It becomes a perfect app, provided you travel a lot, live in a multicultural region or just willing to learn new languages. Includes text-to-speech feature
MDict - This is the first Windows Phone application from TMA Mobile Solutions.
With TMA mDict, you are free to access 8 different dictionary types. mDict also provide bilingual support (English and Vietnamese)