Applications that teach foreign languages are also easy to find, and apps for learning Arabic are no exception. Numerous aspects of learning Arabic are easy for English-speaking students to grasp.
While the Sogdian alphabet was still in use, it was written with the Old Turkic alphabet from the 6th-9th centuries. Interestingly, the Arabic writing system is composed solely of consonants.
Many of those have no visible form of their own. If you are writing in Persian, on the other hand, you don't need to add anything in this case. Combining characters The main arabic block contains 52 combining characters, with 43 more in the Arabic Extended-A block.
Are there other problems relating to bolding or italicisation - perhaps relating to generalised assumptions of applicability?