[@netweb Keymaster 10 years, 9 months ago]

I think for Czech the files should be bbpress-cs.mo and bbpress-cs.po

When you export the translations from translate.wordpress.org you should also change a couple of the defaults:

• Make sure the filter Current/waiting/fuzzy + untranslated (All) is showing the waiting translation

• Select the only matching the filter and then click export to export the .po .mo (This way you’ll get the those strings that have not yet been approved)