In bbPress 2.2+, change Forums Archive Title (forums main page), some Breadcrumbs arguments, User Role display names plus a few other Forums Strings.
bbpress-string-swapfolder to the
/wp-content/plugins/directory -- or just upload the ZIP package via 'Plugins > Add New > Upload' in your WP Admin
Note for own translation/wording: For custom and update-secure language files please upload them to
/wp-content/languages/bbpress-string-swap/ (just create this folder) - This enables you to use fully custom translations that won't be overridden on plugin updates. Also, complete custom English wording is possible with that, just use a language file like
bbpress-string-swap-en_US.mo/.po to achieve that (for creating one see the tools on "Other Notes").