Ï

Ï, lowercase ï, is a symbol used in various languages written with the Latin alphabet; the Latin letter I with a diacritic of two dots, which may be read as I with diaeresis.

Initially in French and also in Afrikaans, Catalan, Dutch, Galician, Southern Sami, Welsh, Purépecha, and rarely English, is used when follows another vowel and indicates hiatus in the pronunciation of such a word. It indicates that the two vowels are pronounced in separate syllables, rather than together as a diphthong or digraph. For example, French maïs (; "maize"); without the diaeresis, the is part of the digraph : mais (; "but"). The letter is also used in the same context in Dutch, as in Oekraïne ( *; "Ukraine"), and English naïve ( or ).