Beta version. The pronunciations given here are indicative: they aim at a quick, intelligible reading and will be refined. Provençal is spoken with nuances that writing renders poorly, and the ear remains the best guide. Watch the video, listen to speakers, and tell us what sounds wrong to you.
A vowel group is said in one breath
A diphthong joins two vowels, a triphthong joins three. In both cases the group is said in a single breath, without a break, each vowel staying audible. The stress always falls on the first vowel of the group, or on the first vowel of the diphthong forming the second half of a triphthong : it never falls on the u.
The i-diphthongs : ai, ei, èi, oi
The groups ai, ei, èi and oi end on the i sound, as in the French word "ail" (garlic) or the English word "boy".
Oui is said "wee" or like "fenouil"
The group oui is said like "ouil" in the French word "fenouil", or "wee", in a single breath.
The u-diphthongs : au, éu, èu, óu, òu
The groups au, éu, èu, óu and òu end on the "oo" sound, with the stress on the first vowel.
The i- and u-triphthongs
The groups iai and ièi form triphthongs ending on i. The groups iau, iéu, ièu, ióu and iòu form triphthongs ending on u. All are said in a single breath, the stress falling on the first vowel of the diphthong forming their second half.
Uei is a triphthong
The group uei is said "u-eï" in a single breath, with the stress on the second part of the group.
Ue is said "u-eu", iue is said "i-eu"
The group ue forms a diphthong said "u-eu". The group iue is said "i-eu", in a single breath.