In the South-West Indian Ocean, Mauritius and Reunion are part of a group of islands where French-based Creoles are spoken. In spite of their geographical proximity, Mauritian Creole and Reunion Creole are strikingly different in their morphosyntax. The first part of this volume describes some structural properties of their grammars. Both languages also differ in the degree to which they are standardized and used in education and in public spaces. One of the goals of this volume is to examine their social status and their use in writing, especially after the introduction of Mauritian Creole as a subject in schools as one of the ancestral languages. French and Bhojpuri are also part of the multilingual Mauritian context. One chapter in this volume analyses the role of Bhojpuri in the formation of Mauritian Creole, while another studies the pronunciation of Mauritian French.