Breton phonology

Vowels
Vowels in Breton may be short or long. All unstressed vowels are short; stressed vowels can be short or long (vowel lengths are not noted in usual orthographies as they are implicit in the phonology of particular dialects, and not all dialects pronounce stressed vowels as long).

All vowels can also be nasalized, which is noted by appending an 'n' letter after the base vowel, or by adding a combining tilde above the vowel, or more commonly by non-ambiguously appending an 'ñ' letter after the base vowel (this depends on the orthographic variant).

Diphthongs are.

Consonants
/ʁ/ is used in the French influenced standard language whereas /r/ (or its weaker allophone /ɾ/) and /ɹ/ are used in more conservative dialects in northern Léon (Bro-Leon) and Trégor I(Bro-Dreger) and by some elder speakers in Vannes (Bro-Gwened).
 * Pronunciation of the letter r and thus the phonetic inventory of a Breton speaker varies in Brittany: