One of my biggest gripes about the ASUS Transformer Prime and its keyboard dock was always ASUS' own on-screen keyboard app.
As I am from Germany I got a german dock (which is good). But unfortunately ASUS forces you to use their own on-screen keyboard app to be able to use the custom hardware keyboard layout.
If you chose a different keyboard app the hardware keyboard reverts back to a generic QWERTY one, which is not really usable ;)
So I decided to make a little mod to change this rather annoying behaivior.
Check out the following link, if you are interested. :)
[MOD] Adjust your hardware keyboard's default language