You'll probably want to add the translated_by Wordlet to your existing set. We didn't add too much to 6.7, so upgrading a board from 6.6 translated to 6.7 won't break anything, and will automagically fill in the credit.
(The Wordlet appears under the powered-by. You'll need to include the whole thing, i.e. "Translation by MyName!")
Donate to UBBDev today to help aid in Operational, Server and Script Maintenance, and Development costs.
Please also see our parent organization VNC Web Services if you're in the need of a new UBB.threads Install or Upgrade, Site/Server Migrations, or Security and Coding Services.