User blog comment:SpiritedDreaming/RWBY: Attack on Kevin Tower Defense Game/@comment-27888871-20160929233951/@comment-25936766-20160930000117

Kek=Lol. Members of the Horde and the Alliance, when reading the words of a member of the other, they are altered.

IIRC, to the alliance, the Horde members say Kek instead of Lol.