Description

Discovered in #42745 (comment).

The file block uses __ in its save function. It's a static block so the internationalized output causes the block to be non-deterministic, resulting in validation errors.

Typically save output for static blocks can't be internationalized.

This could be a tricky one to solve, as removing the use of __ could cause a lot of blocks added in the non-default language to become invalidated. Maybe a deprecation is possible though.

Step-by-step reproduction instructions

To repro (in the post editor):

1. Upload a pdf to a file block
2. Publish the post
3. Change to a different language
4. Reload the post in the editor
5. Observe that the file block now has a validation error

I would recommend reproducing without the Gutenberg plugin active, as a lot of the translations are missing (at least for the dev version).

Screenshots, screen recording, code snippet

Environment info

No response

Please confirm that you have searched existing issues in the repo.

Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

Yes