I have a multisite installation and I installed the wonderful wp e-commerce plugin on it and activate it for one of my site. All my sites are English but this one is French. I would like the message coming from e-commerce like "Updating Cart..." to be in French and the product page as well.
Under wpsc-languages there are wpsc-fr_FR.mo and wpsc-fr_FR.po which contains the right information. But I don't know where to tell WPSC it should use these files? I tried in the setting of my theme under WPLANG but the value doesn't stay after I saved.
I also tried to change the wp-config.php (WPLANG) but this is for the whole site not only for this particular site - and it didn't work anyway.
Any help would be very much appreciated. Maybe it doesn't work for multisite?