I think that with this patch the possible regressions are removed. I
took the opportunity to add some improvements (the :babel-ini-alt,
:script and :script-tag properties) and correct some errors and typos.

I don't know if it's a valid path to allow the car of each element to
also be a list of languages codes, but I couldn't think of a better
solution for the "de"/"de-de" cases. A similar case is in Chinese
Simplified (new language added), where the possible language codes are
zh and zh-cn, if I'm not wrong.

--
Juan Manuel Macías

https://juanmanuelmacias.com

https://lunotipia.juanmanuelmacias.com

https://gnutas.juanmanuelmacias.com