Why not include Chinese/Korean/Japanese that live in Europe/US etc?
There are TONs of those who speak both English and an Asian languages.

I myself would love Korean support on N900 natively like the iPhone.
(iPhone supported Korean even when it wasn't even released in Korea)
Few of my Korean friends bought an iPhone only coz it supported Korean for SMS'ing others.

Even if this kind of market is only 20million world wide (pulling figures out of my head), that's 20 million less. If out of that 20 million, only 10% buy N900 regardless, maybe it could have been 20% if it supported CJK out of the box. I'm sure a few days/weeks of coding for CJK is worth to get that extra 10% which might still end up being a million more N900 sales. (Okay, maybe not 1 million, but maybe 50000 or 100000. Dunno, either way, that's a huge number of extra users and huge number of potential "good" developers for Maemo)