There are varying degrees of familiarity. I can technically read Japanese kana, for example. Only a few dozen to memorize, after all. But using a programming

There are varying degrees of familiarity. I can technically read Japanese kana, for example. Only a few dozen to memorize, after all. But using a programming language with all its keywords in Japanese is a rather daunting prospect. I still tend to mix up some of the kana visually, for example. And I don't know much Japanese vocabulary so most or all of the terms would be opaque to me. It seems it would be a lot more mental heavy lifting than programming in my native English, especially at the start.