Feature summary: When I delete a page, I can choose frequent reasons from a dropdown that is defined by MediaWiki:Deletereason-dropdown. I would like to have this functionality for renaming. This is not my personal problem any more, as I solved it with JS at https://hu.wikipedia.org/wiki/Szerkeszt%C5%91:Bin%C3%A1ris/Renamereasons.js, and also made it available for huwiki users as a site gadget, but would be nicer and most efficient as a native MediaWiki solution which does not seem too hard compared to existing deletereasons.

Use case(s): Renaming is a common task, and reason is required. There is a bunch of usual reasons.

Benefits):

• Helps users in filling the reason.
• Predefined reasons make it possible to use standardised forms whenever they fit.
• Standardised form is very useful in machine analyzing move logs.
• Predefined reasons make it easy to link the corresponding guideline in move reason which makes it clearer, while users would not do it one by one.

Sorry if I dind't find the correct project, I am not familiar with MW structure.