A cedilla ( ; from Spanish), also known as cedilha (from Portuguese) or cédille (from French), is a hook or tail ( ) added under certain letters as a diacritical mark to modify their pronunciation. In Catalan, French, and Portuguese, it is used only under the c, and the entire letter is called respectively c trencada (i.e. "broken C"), "c cédille", and "c cedilhado" (or "c cedilha", colloquially).