Mongolian is written and read vertically like such:
seeing it horizontally is what makes it look similar to Arabic.
On Fu zhuan bricks is often Chinese, Arabic, Tibetan (not on all) and Mongolian language. Some, like this brick, can see with different wrapper packed special for different market.
Mongolian traditional language (which is use these days only in Inner - Chinese part of Mongolia) was devised by some Uyugur man for Mongolians lazy warriors
, so it is really look similar with Arabic, but write vertically.