📜 Allow for extra content for some languages?

[Felienne]

In addition to #5720, the Chinese content makes would like to create some additional pages for their content, such as:

The main content will include: +Community introduction +Hedy learning documents +Hedy promotional event announcements/notices/reports +Hedy training resources, appointments

I am totally ok with that suggestion, but I am not sure how to practically make that happen, because currently all content exists in all languages and we don’t have support for content only in one language.