Translation in Studio not working


I have a standalone BuddyPress site (don't have multisite going) and am having issues with making my site show up in French.

Before I switched to the Studio theme (ie. with TwentyTen and the default Buddypress theme) everything was in French, no problem. Then I activated the Studio theme...and a great many things are still in English (a few things are in French). The sales page for the Studio theme says it's "Fully Internationalized" so I don't understand why I'm still seeing a single word of English.

I have:
- specified in my wp-config.php file
- uncommented lines 11-14 in functions.php
- changed line 12 in functions.php to: return fr_FR;

What am I missing?? Thanks in advance!