Hassaniyya is an Arabic dialect spoken by around 4 million people in Mauritania, Western Sahara, and parts of Morocco, Algeria, Mali, and Senegal. It's the language of the Sahrawi people and significantly diverged from Modern Standard Arabic, with influences from Berber and West African languages. The US Hassaniyya-speaking community is very small, with translation requests typically tied to USCIS asylum cases tied to the Western Saharan situation. Hassaniyya is usually written in Arabic script.