Programming in Japanese

Or any other language.

Anyway, I'm just curious; if you're a native jap or something and only speak ______, do you need to learn english to program? what about html? on any foreign language site I've looked at, the source is always written in english...

pääohjelma :: SyöttöJaTulostus ()
pääohjelma = tee
  kirjoitaMjonoRv "Syötä kokonaisluku."
  n <- tulkkaaRv
  tulosta € kertoma n

kertoma :: (Kokonainen a) => a -> a
kertoma n = tulo [2..n]