[marinintim]

Language switch is problematic for Emacs users in general, 'cause it messes with bindings.

So when I do emacs I use mule, which is mapped by default as C-/. It is not so bad if you remap Caps to Control, but still not one key.

[qwertyuiop924]

Well, the idea is that you're using emacs for your code, and then you jump over to your mail client (all the emacs mail clients don't really work for me), and hit a key to switch over to russian, or whatever.