Absolutely agree! Many UI element (if not all) seem to render languages based on their IDs, which typically reflects the order in which they were created. It would be great to have the ability to manually define a custom sort order, so we could organize them alphabetically or by relevance.

@iOvergaard Should this task no be quite simple to implement and someone from HQ could write an 'issue' with the requirements and maybe be an up for grabs for the community?
Or are their major problems in adding a sorting order to languages?

I added an initial PR #19515 but I think we need a concept how the sort data within a collection.
It may be simplify enough to enable a "sortable mode" with only a few entities and something similar to this:
https://dev.to/gaisinskii/draggable-table-row-with-vuejs-vuetify-and-sortablejs-1o7l

Most projects probably only a few language and 20 or 50 languages may be okay to show in one page (I haven't checked it the language collection actually is paged, but I guess at some point it is).
I also consider how it could implemented in a content collection / list view (currently I think these can't be sorted directly from collection/list view).