Carbon is Google’s successor to C++ and has bidirectional interoperability.
Porting TeXmacs to Carbon with the help of an automated tool and Google devs could give TeXmacs a lot of attention.
Why not market TeXmacs by porting it to Carbon with the help of Google devs?
It would not be helpful to switch the language (which is a huge task). Right now, TeXmacs uses C++98. Switching to a newer C++ is not under consideration, let alone switching the language, especially an experimental language.
Such a port isn’t important technically speaking but it might be a good way to attract attention to TeXmacs, especially from Google developers and anyone else who cares about Carbon.