Board Game Arena

I'm fairly new and loving BGA. Is there a guide somewhere to common acronyms used in chat?

I've worked out that gg is good game. I'm seeing gl and hf used at the start of games - is it good luck / have fun? Or something else?

Any others to help me communicate with my fellow players?

Yes, exactly that I don't see any other acronyms used, or indeed much chat apart from that lol.