The usefulness of your Apple watch depends on the app that you install in it, if you want it to be more useful and much more functional download some cool apps , one that I might recommend is the Translator 73 app, an iPhone app with added support for Apple watch.
Download this app and have a feature on your Apple watch that translate any languages to your desired lingo. Translate up to 73 languages easily. Yes a total of 73 languages and with 26 languages that Apple watch can pronounce it to you.
No need to worry if you are travelling in other parts of the world, Translator 73 will translate it for you, with the option to bookmark it, as well as see the latest translation list.
Directly translates between any two of the 73 supported languages.
Bookmark and Recent History
Pronunciation for 26 languages
Translated text can be used for Printing, SMS, Email, Facebook and Twitter
Apple Watch supported for quick access of saved and recent translation list