Problem: Some languages (Chinese, Japanese, Korean, etc.) were historically written in multiple directions. Sometimes there are directional wordings in text that requires specific matching text direction in transcription to understand. Some might also prefer reading the text in original direction instead of modern direction.
Proposed solution: Support the display of Chinese/Korean/Japanese text in non-default direction.
There could be a default orientation setting for each document
And then user can also change the setting as they like
It will also benefit other non-wikisource wiki projects that are written in those languages, allowing users to read those wikis in the way they like
Who would benefit: People reading historical documents in relevant languages Wikisource. And also just general readers of wikiprojects in those languages. Editor of some of the relevant language sites sometimes used special formatting to keep some text vertical, which would no longer be needed if such support is implemented.
More comments: I have originally drafted the wish in 2018 but was not submitted at the time. Some browsers like Vivaldi have a reading mode that have built in support to change text orientation in the reading mode, however they don't work properly with advanced text formatting.