alt Hacker NewsUhh… The fact that there's no Archlinux package for a given language doesn't imply there's no tree-sitter support (official or 3rd-party) for that language? See e.g. the very long list of languages on https://github.com/Goldziher/tree-sitter-language-pack , which does include R, YAML, Golang, and many more.
it does suggest lack of mature support though, and it breaks your configs if you want to rely on system libraries