Language files do not work. I followed instructions tried everything, renaming .po files, changing even the template, it always shows the english translation.
open wp-filebase/languages/template.po with Poedit and save as wpfb-xx_YY.po (xx is your language code, YY your country). Poedit will create the file wpfb-xx_YY.mo. Put this file in wp-filebase/languages and share it if you like (attach it to an email or post it on my blog).