Can't activate translation in Yoko theme

Hi all,

I installed and activated the great Yoko theme. It comes with some translations in it (and I checked the files are there in its languages folder), but althout I have my WordPress in Spanish, Yoko doesn’t picks up the Spanish translation.

From what I’ve read, once I have the blog settings in Spanish, there shouldn’t be anything else to do and the theme should just automatically use the matching translation.

I have the line “define (‘WPLANG’, ‘es_ES’);” in my wp-config.php file. Is there anything else I’m missing?

Thanks!