It was a blue name.
I guess the main strange thing was that the guy didn't seem to want to answer any questions, but maybe he couldn't as he didn't know any english. If they had popped in and said "just checking the server" or something then that would have been fine.
Yeah, this is what I thought would be the case which is why we were a little worried about hackers. At the time I thought it was odd that the guy wouldn't answer any questions? Are you a GM...etc, but then I realised that they might only speak spanish, that's why they couldn't respond. I know a very small amount of spanish, so I might have been able to reply.
It was a blue name called link (lower-case I think), that's all we can remember, I really don't know who it could have been. Whoever it was, it wasn't a major deal. It kind of spoilt our game for the day as my friend wanted to quit then, so I only played for a little while later, but no biggie.
If something like this were to happen, again, what should I do? Assume everything is safe and just keep playing? I can possibly talk to the GM in a small amount of Spanish if need be -- really basic stuff. Are there any other languages that the GM's use?