Stack Exchange sites can create custom close reasons that can be used as an alternative to the default community-specific close reason. Language Learning SE currently has one custom close reason for the main site (proposed back in October 2016). It says,
Questions about grammatical rules or specific characteristics of a language are off-topic here. A language-specific site is the appropriate place for these questions, or if such a site does not yet exist, you can propose one on Area 51.
Since this close reason was created, an important change regarding close reasons has taken place: it is now possible to define different texts for different audiences or roles who are viewing or reviewing the closed question. Our current custom close reason still employs the old format, in which everyone sees the same message.
Using the new format for custom close reasons, we can define different formulations for different audiences or roles, to wit:
- a brief description: the bold header for the close reason (at most 100 characters).
- usage guidance: the text that will appear in the close menu, advising people when to use the close reason.
- the close description: the text that will be shown to everyone in the post notice and should be relatively short.
- the post owner guidance: text that appears in the post notice and is how the question owner (or OP) should fix the question (if possible).
- the privileged user guidance: information for users with close privilege regarding what the close reason is.
The goal of this question is to gain consensus on what the audience-specific texts should be for the “grammatical rules or specific characteristics of a language” close reason. If or when we have defined these new texts, we can contact a CM to edit them into the current close reason. (Simply creating a new close reason and deleting the old one would work technically, but may mess up the close-reason statistics and have unintended consequences for questions that were closed in the past.)
I will post my own suggestions as an answer. Please vote and provide feedback. This should be reviewed widely so as to represent a community consensus. (For similar posts like this one, see Academia SE, Science Fiction & Fantasy SE, Literature SE, French Language SE and my earlier proposal on Language Learning SE. Meta SE does not appear to have a post about this.)
Update 19.09.2021: Tag status-review added. A CM will be contacted to help us making the necessary changes.