[زيد الهلالي]

I would suggest we stay in the same course of removing fonts. We have gone through this path many times with our own machines and others.

I presume you removed none other than Arial and Times New Roman only (no harm in other TT fonts) those where only in your account not under the HD or System Libraries MS Office installs its buggy fonts in user account rather

Now if you want to go further in setting up your Arabic which may not be related to the display issue on the web. Open System Preferences then click on the International icon. Hit the Language button and then click on Edit button underneath to add Arabic from the drop list. You may un-tick unwanted languages while there

Click on the Input Menu on top of the International Window to access Arabic Keyboard that shows Green Crescent; tick to select it

Now you should be able to type Arabic in Text Edit for example.