There's a list of languages here [1]. It looks like someone helpfully added
maintainers to the table. You could find languages without a listed
maintainer there and then check the header of the source file [2] to be
sure there's no current maintainer.

[1] https://orgmode.org/worg/org-contrib/babel/languages/index.html
[2] https://code.orgmode.org/bzg/org-mode/src/master/lisp

On Thu, Apr 22, 2021 at 1:14 AM Dr. Arne Babenhauserheide <arne_bab@web.de>
wrote:

>
> Timothy <tecosaur@gmail.com> writes:
> > As far as I know the only call for help maintaining Org has been with
> > babel packages. Otherwise you would have seen me volunteering :P I'd
> > like to do more if I get the opportunity.
>
> I’m currently in the process of enabling myself to contribute. Do we
> have a list of babel-packages that need maintenance? This is also
> something I’m personally interested in, because I use babel a lot,
> including in multi-language workflows.
>
> Best wishes,
> Arne
> --
> Unpolitisch sein
> heißt politisch sein
> ohne es zu merken
>