so /container/shell also does not support localized language
In fact, nothing in RouterOS really supports anything beyond 7-bit ascii. Sometimes it “accidentally” works, but that’s all. RouterOS doesn’t understand any encoding, it just sees some bytes and how they display as characters is not consistent.
E.g. if I put “ěščřžýáíé” in some comment using WinBox, then in WebFig on same computer it shows messed up. If I enter the same using WebFig, it’s messed up in both WinBox and WebFig itself. And if I connect to same router from computer with different system codepage, everything will be messed up in yet another completely different way.
when i used container，i need run sshd on container，use another ssh client connect to container show localized language