Language Based Access Control

Hello,

I'm building a multi-lingual site, where I would like different translation groups/roles to be able to work on their language (and only their language) to translate source content. In some cases translating in response to content being posted, and at other times originating the content.

Of the current access control methods I've looked at, there are ways to control access based on Taxonomies, Node types, and individual nodes... I may be missing something, but is there a way to control access based on language aside from making people specify the language of the content through taxonomy?

-KT