WordPress MU

I installed the spanish language file and set it up as the default, but it doesnt seem to translate the blog menu, it does translate nearly everything in the admin panel, which is good.

What should I try to do?

Are you going to be the one using the admin console? If so, you seem to speek english very well, so I wouldn't worry about it as long as it translates everything else.

Yes I will be the only admin, but I ment that I installed the language file so the blogs my users create are in spanish, so far it seems that half of the test blog I created is translated.

You can check out http://www.bloghost.cl/kostya and see for yourself that some things are in spanish, and other just don't want to translate. I've downloaded the .po files and everything IS translated. For example, it says 1 Comment, if I check the .po file it HAS the translation for it, 1 Comentario. I find this strange, because it does translate stuff, just not all of it :P

EDIT: I checked out the files in the /themes/default, and it seems that there are some things hard-coded. Should I just translate them directly there? Or in the future everything will be translatable?

if the theme/template has items hardcoded in english then you'll have to translate those items manually.

Ok, no problem. I'll see if I just leave it in english or not, it's not that hard to find your way through the blog anyway ;)

As long as things like months and days are translated users should not have much of a problem. I mean, how hard can it really be to tell that "comments" means "Comentario", lol. :)

not every template is i18n :-(
put the untranslated strings into a
<?php _e('string')> to echo and __('string') for printf and such. Most should be translated now.