How do I create multilingual user path aliases?

I'm setting up a multilingual site, and I need the user path aliases to be multilingual.

Users are set up as translatable:

Language Detection: URL (path prefix)

• English: /en
• Japanese: No prefix

Pathauto patterns:

• English: /en/users/[user:name]
• Japanese: '/users/[user:name]

Example:

• Username: Admin

Expected paths:

• English: /en/users/admin
• Japanese: /users/admin

Actual:

• English: /en/user/1
• Main language: /users/admin

I've cleared the registry, regenerated the URLs, manually unset path aliases on the user then checked the box and re-saved, but I have not found any combination that results in multilingual path aliases.]

Update

I've tried the following, which also did not work:

I followed your setup on a vanilla D9 and can report on the following:

• Pathauto aliases are created as expected but only for translated users That is an expected outcome looking at Pathauto's code, since it will start generating language specific aliases based on a pattern only for the translated languages of each entity during bulk updates and only for the active language of an entity during hook_entity_update.
• A manually created path alias for an untranslated language of a user entity does work and resolves properly.

In short, the answer is:

Multilingual user aliases are created automatically by Pathauto for each translated language of a user entity, or can be added manually for non-translated languages of a user entity.