Comment by silon42
4 months ago
I wish there was a single letter universal locale with sane values, maybe call it U or E, with:
ISO (or RFC....) date time, UTF-8 default (maybe also alternative with ISO8859-1) decimal point in numbers and _ for thousands, metric paper / A4, ..., unicode neutral collation
but keeps US-English language
si_LK is close to your requirements, but uses the comma for thousands. I don't think any locale uses underscore.
number: 12,345.67 date: 2025-10-14 09:45:17 paper: A4 (210×297)
https://lh.2xlibre.net/locale/si_LK/
I personally think en_DK is a better compromise.