Hassaniyya, also known as Hassani, is an Arabic dialect spoken mainly in Mauritania and parts of neighboring countries in West Africa. It belongs to the Maghrebi Arabic dialect group, which encompasses North African Arabic varieties. Hassaniyya has distinctive features that set it apart from Standard Arabic, including influences from Berber languages and Sub-Saharan African languages.

The language is of significant cultural and historical importance in the region, as it reflects the fusion of Arab, Berber, and African cultural elements. Hassaniyya plays a crucial role in daily life, from informal conversations to traditional poetry and songs. While Arabic script is used to write Hassaniyya, it does not have a standardized writing system, and it has historically been a primarily spoken language. However, there have been efforts to develop a standardized script for Hassaniyya, particularly for educational purposes and cultural preservation.