MarsSeed [1] filed a deletion request for apertium-svn [2]: Abandoned, defunct leftover from 2017. Upstream not developed in Subversion repo since 2018 [a]; they migrated their code to GitHub.
There's a maintained stable apertium pkg on AUR. [a]: https://sourceforge.net/p/apertium/svn/84369/log/?path= [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/apertium-svn/
