Not necessarily. Learning enough English to understand the UI is much lower level than being able to converse.

It's also the difference between active and passive command of the language.

> Not necessarily. Learning enough English to understand the UI is much lower level than being able to converse.

Exactly this. For example, I am learning German and have changed the language of my reading tablet's UI to German. That in itself is a useful learning tool.

Also "right click -> Translate to <x>" takes care of the UI automatically (in Chrome at least) but still doesn't solve the issue that English can not used to converse with the AI.