How to mark strings within JavaScript code as translatable

[gabalafou]

Can you open a new issue to remind us to come back to this (question about marking strings as translatable if they're generated within JavaScript) please?

Originally posted by @drammock in #1454 (comment)

Summary

In 1454, I added a banner type landmark to the pink version warning banner and labeled it with the string "Version warning" (in pydata-sphinx-theme.js line 473).

The landmark label is not visible; it's only exposed by assistive technology, such as screen readers. But like all user-facing strings, the "Version warning" label needs to be added to the set of translatable strings, but I don't know how to do that in JavaScript.

[trallard]

@gabalafou IIRC you figured out how this works? I am going to close this issue but if not feel free to re-open it