I don't think applocale would work because of the way OGP forces you to go through their launcher to play latale.
The only way I can think of is to change system locale into japanese/korean, but let me test this before I confirm anything.
And @Cinner it will still be english even if it was launched in a different language in applocale. The only difference is those funny looking yen and other signs would be ☆ or ※, I forget.
edit: Okay I've tried Japanese system locale, heck I changed my OS into Japanese and it completely failed to make the font any bigger. I guess it really doesn't work anymore (note the ッ and リ, meaning I got it into unicode/japanese at least)
oh yeah this was done on Win 7 64 bit .