Thread:Support/Babel translation appearing only partially/reply (7)

It looks like there is no easy way to fix it. Rather a major rewrite of message handling and caching would be needed so as to make both language-aware. While this cannot be avoided for various reaasons, imho, it's a major task which I believe to take quite some time.

Thus, currently not fixed, and reverted to use the content language for outer Babel box headers and footers.