Is the word "إشلون" Arabic, and what is its grammatical analysis, knowing that it means "how are you?"

The phrase "Aish Lawnak" (أيّش لونك) is an unknown construction in Arabic speech. It is composed of "Ayyu Shay'" (أيّ شيء - what thing) and "Al-Lawn" (اللون - the color), and it is intended to ask about one's condition. Its grammatical analysis is as follows: "Ayyu" (أيّ) is a mubtada' (subject) in the genitive case by إضافة (annexation), "Shay'" (شيء) is a mudaf ilayh (annexed noun), "Lawn" (لون) is a khabar (predicate) in the genitive case by إضافة (annexation), and "Al-Kaf" (الكاف) is a mudaf ilayh (annexed noun).