Checkout UI extension schema translations not working

It seems that setting a translatable name in shopify.extension.toml does nott work:

[[extensions]]
name = "t:name"
description = "t:description"
handle = "checkout-ui"
type = "ui_extension"

/locales/en.schema.json (using en.default.schema.json will throw an error because of en.default.json):

{
    "name": "Some random name",
}

I’ve tried settings translations at /locales/en.json and /locales/en.schema.json and it will simply show this:

There’s nothing mentoning schema files here as well:
https://shopify.dev/docs/apps/build/checkout/localized-checkout-ui-extensions/localize

This also seems a old problem, here’s a thread from last year mentioning this problem:
https://community.shopify.com/c/extensions/how-to-localize-checkout-ui-extensions-setting-field-names-amp/m-p/2742473

This is my ugly workaround so far:

Hi David - we currently don’t support translated setting names, but this is on the teams radar.