There are a few words that take a regular plural suffix, but most of the time to make a plural you have to change the structure of the word quite dramatically: The structural change is regular. That is you don't have to learn each name plural. The Arabic writing system is exotic looking but easy to learn, which is a rare combination. The language uses a straightforward alphabet, but because letters change their shape…
No, English and French don't have a concept of "different characters for different places." The "c" in "cat", "act" and "topic" are all written exactly the same. It's not "cat", "a#t" and "topi*"
There are many languages, besides Arabic, that have a concept of distinct initial, medial and final characters. For example, the dozens of writing systems derived from Sanskrit.