The traditional script is written from top to bottom and from left to right.
Only Firefox rotates the direction of the form fields.
Chrome, Edge, Safari browsers place the form field horizontally (only in the frame).
To type directly with the computer keyboard:
The Cyrillic script can be used.
Download & install the font Mongolian White
→ conversion: Cyrillic <> Latin Mongolian
→ conversion capital-small letters
→ Mongolian language: dictionary, pronunciation, grammar
→ Multilingual keyboard: index