Flappy Bird is a name of the videogame and it cannot be translated to another language as that would not make sense in this instance, so it would have to stay the same.
Only thing I could say is " Lehviv Lind " - Fluttering bird, though that does not necessarily make sense.
Quoting leafo from the Discord server: "It's to edit accounts you have blocked. I believe this appears when you are viewing the post of someone you have blocked, instead of seeing their post you see an empty space and a link to edit the block"