“Is German for basketball”? I’m a little confused here too. The question doesn’t really make sense.
IMHO.
The question might not make sense but Bieber made clear he didn’t know what “German” meant.
He was asking Bieber if his name “Beiber” meant “basketball” in German. Pretty simple and obvious.
Also pretty simple is Bieber, who had no idea what the word “German” meant.