> On 24 Jun 2020, at 16:05, Ken Moffat via Bug reports for Bison, the GNU > parser generator <bug-bison@gnu.org> wrote: > > UTF-8 on its own is not a valid locale. > > A quick search on google suggests that LC_CTYPE will, among other > things, control what is a valid letter, and lowercase|uppercase > conversions.
POSIX [1], sec. LC_CTYPE, only requires that the ASCII letters are converted. 1. https://pubs.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap07.html
