Personally, I think that if you rewrite the translator from the ground up, you should just put yourself as an author. To me the creator field is more of a hint as to who I should bug if there's some odd logic in here (others take this as credit for their work even if it has been rewritten, which is fine, I won't fight it). We do have git-blame, so this makes it less of an issue, but I still find this field informative.