How can I detect which language is use typing into EditText. I know the API 13 has getCurrentInputMethodSubtype, but what is the alternate for older versions?
There is none. And I wouldn't count on even that above working across all keyboards. I wrote a popular keyboard and have no idea where the framework would get that info from- there's no API for them to query what keyboard type we are or for us to update if we switched (say from a user using an in keyboard switch language shortcut).
The keyboard API is really Google's bastard stepchild. They don't seem to put a lot of thought into it, or work with other major keyboard makers when adding new functionality.