I know this is not exactly what you are asking for, but are you aware of the layout called "English International with AltGr dead keys"? (lets call it EI) If t

I know this is not exactly what you are asking for, but are you aware of the layout called "English International with AltGr dead keys"? (lets call it EI) If two or more of languages you switch between happen to be based on latin-script, it's quite likely your will be able to use EI instead. I previously switched between Danish (for ÆØÅ) and English for programming, but since discovering EI I haven't had to switch at all and it's been a real pleasure.