In what language is "fy" an acronym for gg?
"Good game" in different languages?

I can't say I'm very good at Chinese, but "好游戏“ seems a bit strange to me. Wouldn't that be more like "[Chess] is a good game"? I would have guessed something like “好局" instead ("a good game [of chess]"). My own native language (Swedish) makes the same distinction between games that you play (spel) and a game of e.g. chess (parti).
I think that in Sweden we just say thank you after the game, ie. "tack".

we say "god kamp" before the match in denmark otb
after the match we say "tak for spillet" ...no matter how the game went.
I'm playing others from so many countries that I thought it would be good to be able to be meagerly sportsmanlike in different languages. Does anyone want to provide a translation into their language? I'll start it off with Mandarin Chinese:
好遊戲 (hǎo yóu xì)