You don't have to! You can just say it's imported from a language that doesn't use the Latin alphabet, so there's no canonically correct way to spell it.
It's probably a lie but it doesn't sound like one!
Though Arabic has quite a few letters you won't find in the Latin alphabet, all the letters in the word shakshukah map perfectly to Latin letters. But put an H on the end, and quarter-pronounce it.
It's probably a lie but it doesn't sound like one!