MarsSeed [1] filed a deletion request for cainteoir-engine [2]: Broken C++ and Python2 based text-to-speech engine pkg from 2017. Upstream not maintained since that year. [a]
Safe to delete. There are working alternatives. [a]: https://github.com/rhdunn/cainteoir-engine [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/cainteoir-engine/
