In the meta question Is [language-agnostic] an appropriate tag the top-voted answer is in favour of eliminating the language-agnostic tag provided that we make it clear that our intent is that all puzzles are open to all languages by default and if the asker wishes to restrict a question to one language that must be explicit. 3 of the other 4 answers are in favour of eliminating the tag.
The best way to make the intent clear would be the FAQ. So the question is: is there any reason not to add the following to the FAQ, between the current third and fourth bullet-points about questions?
A puzzle or golf challenge is assumed to be open to entries in any language unless otherwise specified.
Ping: there's been no disagreement, but also no actual change in the FAQ in more than a year. Could someone with the ability to make the change implement this?