On Sunday, 14 March 2021 11:08:16 PDT Hubert Tong via SG16 wrote:
> None that I am aware of in particular. However, extending terminfo, etc. so
> that such an interface becomes available in the future could not be
> discounted as a possibility.

Already done, 20 years ago. See
https://en.wikipedia.org/wiki/ISO/
IEC_2022#Interaction_with_other_coding_systems

printf '\033%%G\303\251\033%%@\n'

Will show "é" in any half-decent terminal (including the Linux virtual
console, but apparently not the FreeBSD one), regardless of its own internal
encoding. See this screenshot from xterm, started with LC_ALL=C.

-- 
Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
   Software Architect - Intel DPG Cloud Engineering