get a japanese DQ4
get no$pmp (somewhere in this forum)
get the cheat to unlock the english translation inside DQ4 (should be around here somewhere too but if not, google it)
i think you know what to do next
no$pmp works on japanese DQ5 also, but since there's no english translation hidden inside it and there's no translation patch for it, you're stuck with a moonspeak DQ5