BLU Can't learn spell

[Sylvain]

I've personally havn't check any spell location on the internet, I find them simply by killing stuff and looking where 50+ BLU gather
Also the chat is a good indicator, "LFG FINAL STING" or "STOP KILLING IT BEFORE IT CAST U &é"è&"@!" are also good clues.

Altough I agree, they could have given us a "bit" more clues for those who wanna simply discover by themselves.

[Canadane]

Yes you were particularly lucky with the others.
And "speaking with your fellow players" is the general idea if not looking up datamined information.