On demand language translation for posts

A feature for translating text in posts similar to Mastodon. This would require something like:

• a default interface language setting in profile (defaults to system setting)
• a way to change the language setting when creating a post (and it defaults to the profile setting)
• when rendering a post, detect whether post language is different than users' interface language and offer a translate link in the post
• when user clicks translate link, connect to deepL.com (or other service) to translate the text and then update the post text in situ
• once translated, offer a link to display the original untranslated text

Easy way to observe suggested behavior is to scroll the Mastodon global feed and spot a post in another language.

Limitations:

• Must be logged in for translation to work. Public users don't get this feature. Mastodon seems to limit this feature to logged on users for performance or throughput reasons?

Idea:

• Can component(s) from Mastodon be reused for this? This should be a Fediverse best practice.

Benefit:

• Global community