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
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