Automatic language detection

[bluppfisk]

I'd like to see the following feature in skp:

Automatic language detection when replying to an sms, email or writing on a website. The keyboard could then auto switch to the right language which would save some time. Alternatively, but I guess this means more drastic changes in the contact card model, it could be interesting to save a person's preferred language in the contact card, so the keyboard would auto switch when writing that person.