Gleaned from irc:

Q. Are there any multi-lingual aspects of bitweaver

A. In short, wrap strings in smarty tpl's with some text and in your php, use the tra( 'some text' );. String collection is automatic as is translation

Q. how does it get translated?

A. lookup tables using md5( 'some text' ) as the master key. Translations are all cached to file system in single strings