Is it Kilika Woods and Besaid Island? "Join as one" is part of the al bhed riddle.
Almost! Hence my use of pink lettering, just like translated Al Bhed subtitles. "Kilika and Bikanel join as one", it says, referring to the pieces of the password puzzle. I could be wrong... I'm sure someone will point out if I am.

Auron's voice actor is Matt McKenizie, and a darn fine job he does too. Not sure about Barthello, who appears to have a different, inferior actor in X-2.