I was about to start working on this feature but I noticed that the issue comes from the default `remove` regex:

I was about to start working on this feature but I noticed that the issue comes from the default remove regex:

/[^\w\s$*_+~.()'"!\-:@]+/g

This regex removes anything that's not in that list, meaning it preserves only the listed characters. The \w flag stands for the a-zA-Z range, meaning anything except those characters will be removed.

So instead we can update the remove regex to remove only the listed characters:

slugify('السلام عليكم ورحمة الله وبركاته', {
  remove: /[$*_+~.()'"!\-:@]+/g
})

And this yields the expected result:

السلام-عليكم-ورحمة-الله-وبركاته

But it didn't work

it return result like this alslam-alykm-wrhmh-allh-wbrkath

I tried to manipulate with the source code and when I remove then Arabic letters from the list charMap it's Works well as expected

Originally posted by @simov in https://github.com/simov/slugify/issues/100#issuecomment-782843177

Start by inspecting the default remove regex and the source charMap, as both are identified as affecting Arabic transliteration. Reproduce the Arabic example from the issue and compare the output with the expected Arabic slug; done means the intended remove option preserves Arabic characters instead of transliterating them.