I Like Big Fonts & I Cannot Lie!
Off to the greatest challenge in Arabic UXD – Arabic Typeface. As it represents a key factor in the usability of the interface, the UX designer has to be very intricate when it comes down to making the typeface choice.
The hurdle here is the following: Arabic characters are shorter and wider than Latin characters, and they also take up a lot of horizontal space as they are not readable if used in the same format of English letters. So, in order to achieve legibility, the Arabic type should be 4 points larger than the English type. This implies that your Arabic UXD should take into account the necessary space requirements for the Arabic copy.
Keep This In Mind
There is no monolithic way to create Arabic UXD. Testing and iterating should always be placed on a pedestal, as it is your gateway to the final answers; it’s the mean to fully understand how your users interact with your designs and what they really want out of them.