I have this as well, i'm guessing it's some sort of code for the Battlegroup servers. Blizzard probably intented to do away with Server names in battlegrounds but forgot to remove the codes.
Slorkuz
Blizzard Poster
5. Re: EU5A-BG-EN 26/03/2008 09:05:53 PDT
Q u o t e: I just went into a BG, and instead of saying "Playername - Ravenholdt" or whatever, it said "Playername - EU5A-BG-EN".
Could you please (pretty please) forward to the devs that there are a lot of players liking this change? It helps prevent premade hopping to roll pugs for example.
And people don't go "Aww man it's a premade :( /sigh" as easily are some of the things I read on the US forums.