How can I change the language of the Wear OS by Google app? The language of the app is determined by the language set on your phone. Change the language settings on your smartphone to affect language on your smartwatch. Related articles How do I reset my Smartwatch to factory settings? How can I change the language of the App? How do I set my watch? How far away can my Smartwatch be from my phone and still be connected? Why is the watch I want discontinued?