No, it's from World Of Warcraft. If you said "lol" and you weren't translating, everyone would see "kek"
When I played a game called Tibia a while back, a lot of players from Brazil would often go "kool kids klubkool kids klubkool kids klubkool kids klubkool kids klub", and apparently it was their way of typing laughter. Is that at all related? It's loving annoying.