We have covered plenty of useful Apple Watch apps here in the past. Microsoft Translator for Apple Watch is designed to make life easier for constant travelers. Just speak to your watch to get an instant translation in 50 languages. The app also speaks the phrases for you when you don’t know how to pronounce them.
The app lets you bookmark translations for later use. The companion smartphone app lets you type on your keyboard, select other languages, and copy & paste translation to other apps. The app is free.