I noticed something interesting today when I looked at the usercard of a high-rep user:
I saw that, and was immediately confused because I saw what appeared to be a reputation of 46 and knew that was incorrect. When I saw that he also had 3k gold badges and RTL text in his username, I immediately knew what had happened. Looks like RTL text in a username messes up the formatting of the usercard.
Related, but not exactly the same: Please add Right To Left text support in Stack Exchange