Edit: directly answer your questions.
[1] Yes, they will work fine due to internationalized resource identifiers.
[2] If you are targeting Arabic search results, then yes, having an Arabic url byte is good for SEO. Iโm sure that Google can do translation too.
[3] Copying the paste URL will look ridiculous because of [1]. If you look at the Arabic Wikipedia and try to copy its URL, you will see what I mean.
Additional Information
I know that Google really affects what is in the url, so for example, page-title.aspx will be better than pagetitle. I would suggest that the same rules apply for references to foreign languages โโ- this will help to increase results when people search for terms included in your Arabic word.
Most browsers will handle this, I donโt think you need to install a special language pack. Arab Wikipedia works great, although characters get mapped using internationalized resource identifiers.
https://webapps.stackexchange.com/questions/15539/how-do-special-foreign-language-characters-in-an-url-work-and-are-they-fake
It will look good in your url bar, but it will look like http://ar.wikipedia.org/wiki/%D8%A7%D9%84%D8%B5%D9%81%D8%AD%D8%A9_ % D8% A7% D9% 84% D8% B1% D8% A6% D9% 8A% D8% B3% D9% 8A% D8% A9 when copying.
I always liked how backspace and delete work the other way around with Arabic text.
Dave walker
source share