Numbers are not printed correctly

[mahkoh]

Floats are not always correct and always use . as the decimal separator.

[steveklabnik]

Can you at least provide some code, and what you'd expect it to print?

[thestinger]

I don't think it make senses to have that level of locale support within the current system. There would need to be a separate formatting system taking a locale parameter. A global locale doesn't make much sense because it's not necessarily formatting for the local user it's running as.

[thestinger]

Closing as a duplicate of #7030

Support for locales belongs in an RFC because it's not clear cut.

[ArtemGr]

I don't think it make senses to have that level of locale support within the current system.

And this reasoning is expanded upon here: https://stackoverflow.com/a/44583267/257568.