Change language and orientation on Apple Watch Ultra
Choose language or region
If you’ve set up your iPhone to use more than one language, you can choose the language that appears on your Apple Watch Ultra.
Open the Apple Watch app on your iPhone.
Tap My Watch, go to General > Language & Region, tap Custom, then choose a language.
To add a language, tap Add Language, then make a choice.
Note: In supported languages that use grammatical gender, you can choose your term of address to specify how you would like to be addressed throughout the system (feminine, masculine, or neutral).
Switch wrists or Digital Crown orientation
If you want to move your Apple Watch Ultra to your other wrist or prefer the Digital Crown on the other side, adjust your orientation settings so that raising your wrist wakes your Apple Watch Ultra, and turning the Digital Crown moves things in the direction you expect.
Open the Settings app on your Apple Watch Ultra.
Go to General > Orientation.
You can also open the Apple Watch app on your iPhone, tap My Watch, then go to General > Watch Orientation.