🚀 Internationalization (i18n) Translations [Meta Issue]

### Description

Now that we have initial support for Internationalization (i18n) we need to start working on getting translations in place. This issue will act as a meta issue to help track the work on this

### Links

Documentation: https://backstage.io/docs/plugins/internationalization/
Initial PR: https://github.com/backstage/backstage/pull/17436

Usage examples:

- https://github.com/backstage/backstage/pull/19786

Start with the Internationalization documentation at backstage.io/docs/plugins/internationalization/ and review the initial PR #17436 plus usage example PR #19786. This is a meta issue rather than a scoped task; work is complete only when a specific translation task is split out, implemented, and tracked here.

Written by the indexing model from the issue text.