Idk if its possible to protect your forum better against these spammers.
But when people who want to check out the game come to these forums, click general discussion and see a full page of threads like "बा=बा=जी=91-9636854282 LoVe PrObLeMs SoLuTiOn Baba ji in Mumbai ", i think they could get the (wrong) impression that these forums are abandoned/not moderated, that this is some kind of scammy game or just of general unprofessionality.
Maybe there is no way to stop the spam, and its really not that important of course, just a thing i see almost every time when i visit these forums to look for news about the mmo.