Get used to it, each game has its own lingo. I've been playing Final Fantasy XI for 4 years and I can't understand the people who immigrate from WoW. I shake my head every time someone says "taunt" when they mean "voke" or "DPS" when they mean "DD."

FFXI's lingo is extra cryptic, though, due to the multilingual nature of the game. Things like G1 are counterintuitive to most English players because the G stands for a Japanese word ("genkai," meaning "limit"; it refers to 5 quests in the game where you raise your character's maximum level). Likewise with D2 (Easier to type than "Warp 2," and it has caught on amongst speakers of every language in the game--it originates because "Warp" is "Dezone" in the Japanese client)

I'm sure you can figure out "WTB" (Want to Buy) or WTS (Want to Sell) because they're in English, but start adding in Japanese and things get a whole lot hairier.