Nintendo eshop problem (Nintendo Switch)?

I have a problem with my Switch's eShop. Why is my eShop Mexican (or ka)? Can't redeem codes anymore and wants to change that.

It is always there.

You can speak the language at

System Settings → Console (at the bottom) → Change Language.

That should fix your problem.

I tried Aiaiai, but it didn't work

Have you tried restarting your switch yet?

Often.

https://en-americas-support.nintendo.com/...-location)

From the Nintendo eShop Home, select Menu located within the top-left corner of the touch screen.
Scroll down and select Settings / Other.
Scroll down again until you reach the Settings section.
Tap on one of the following options to change that setting:

HOME Menu Notifications
Language
Location settings
Review credit card information

Thank you