I have a clean instalation of wordpress on a freeBSD webhosting. I upload the es_ES.mo translation and I configure the "define ('WPLANG', 'es_ES');" then the webpage appears in spanish (GREAT!), my surprise comes when i see the "DATE FORMATS" (mainly the months) because it appears in english, because the correct setLocale on freeBSD is not 'es_ES', is just 'es_ES.ISO8859-15' but if i change to the correct set locale for the spanish code, my web appears in english, and my dates appears in spanish.
I figure that the only I need to do is change the setLocale var on the getText.php archive, but i'm a web developer and i know what to do, but you know that the wordpress blog is used by lots of people with a null knowledge of php or webscripting.
This post is just to explain the "bug" and I proppose an implementation of two WPLANG vars (WPLANG and WPSETLOCALE), for example (one for the .mo and other for the date formats).
Thanks for reading.