It would be nice to have multilingual support for the migrate module.
The attached patch adds a destination handler for migrate which takes care about translations.
It's not a really elegant nor a fast solution - but it works. (At least in my test cases ;) )
The patch adds support for node and content based translation.
FAILED: [[SimpleTest]]: [MySQL] Unable to apply patch translation-migrate-support-929402-30.patch. Unable to apply patch. See the log in the details link for more information.