bbPress in Your Language
Like WordPress, bbPress has the built in capability to be used in any language. The instructions below assume you have already configured WordPress in Your Language with define ('WPLANG', ''); in your WordPress wp-config.php file, if you have not setup this do this first by Installing WordPress in Your Language.
Where you can get the language files
Select your preferred language eg. Portuguese (Brazil)
Select 'all current' as '.po' and click ‘export’ and save this file to a folder on your computer, do the same again this time selecting '.mo'
How to use the language files
Rename each file of the files to bbpress-language_COUNTRY.extension
eg. bbpress-plugin-pt-br.po to bbpress-pt_BR.po
and bbpress-plugin-pt-br.mo to bbpress-pt_BR.mo.
Using FTP upload both the .po and .mo files to /wp-content/languages/bbpress/ of your WordPress instalation. If the /wp-content/languages/ and /wp-content/languages/bbpress/ folders do not exist, create them.
Is your language missing?