You'll also need formatting to be the same to get adoption. e.g. I wanted to format numbers as currency, and got USD$x,xxx as a result, and no obvious way to change that to $x,xxx.
Sounds like a bug, but I'm having trouble reproducing. If you share repro steps with breck at rowzero.io, we'll get it fixed.
I’m in New Zealand if that helps. Generally (please) don’t assume location dictates formatting, while Excel’s assumptions are often incorrect and so custom formatting is a requirement.
You can’t even assume location dictates location!
and the translations in the millions localizations not compatible with english formulae