You seem to not get the message: If anyone from “Friul”, using “Friulian” default, wants to have DD/MM/YY
- he can’t do that. His/Her restriction is, that he/she needs to stick with DD/MM/YYYY
and manually format, if he/she wants to use something else than their default. Friulian people will be in the same situation. He/She has also one default for the format, which can’t be changed globally as well. So this absolutely got nothing to do with neglecting a significant portion of the English speaking world, but history, tradition and standards defined (sometimes) by national bureaus of standards.
And if you want that to be changed - feel free to address your issue to developers [here](https://bugs.documentfoundation.org/) and don't assume you are talking to devs in this forum. Helpers on this site are just the bearers of bad (for you) facts, but not responsible for the implementation.