The best way is to use the language settings (admin panel -> Settings -> Language Settings) and change result of the language key. You can find the language key for the sound menu by clicking on the menu icon in the navigation builder and see the value of that specific language key. Another way is to search in the language settings page for the value you want to change (i.e. sounds) and filter through all the language keys to find the one you're looking for.
Alternatively, if you want to take the lazy route, and not follow the best practice, then just change the value of the Language Key field in the nav builder to whatever you want.