Posted earlier in the discussion, the Mongolian President's website works well for me, in Firefox on Linux.
The mouse scroll scrolls right, selecting text works (with a horizontal cursor), the western text (dates, numbers and "Covid-19") embedded in the text are appropriately rotated.
"View source" shows the source text, and it doesn't look like there are any nasty tricks to support this.
For me, the mouse scroll doesn't work unless I enable Javascript for the site (I run NoScript). So, at least that aspect seems to be reliant on some kind of JS-based workaround, not CSS itself.
The mouse scroll scrolls right, selecting text works (with a horizontal cursor), the western text (dates, numbers and "Covid-19") embedded in the text are appropriately rotated.
"View source" shows the source text, and it doesn't look like there are any nasty tricks to support this.
Is anything missing?
https://president.mn/mng/