Change language and orientation on Apple Watch
Choose language or region
Open the Apple Watch app on your iPhone.
Tap My Watch, go to General > Language & Region, tap Custom, then tap Watch Language.
Switch wrists or Digital Crown orientation
If you want to move your Apple Watch 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, and turning the Digital Crown moves things in the direction you expect.
Open the Settings app on your Apple Watch.
Go to General > Orientation.
You can also open the Apple Watch app on your iPhone, tap My Watch, then go to General > Watch Orientation.