iPhone mirroring uses wrong keyboard layout
If I try to type on my iPhone via the Mirroring app on my Mac, it reacts as if I am using a Swiss keyboard layout. Pressing 'Y' produces a 'Z', the apostrophe produces an accented 'a', and so on.
I am *in* Switzerland, but none of my devices have Swiss keyboards. My Mac has a US layout keyboard, and the on-screen keyboard on my iPhone is also US layout. There's no reference I can find anywhere in the Mac or iPhone settings to a Swiss keyboard.
Any ideas?