Trégorrois differs from other varieties of the language in a number of ways: There are several other pronunciation details.
For example, an heol is pronounced /ãn heul/ (compare to the /ar mur/ of Kemper).
This is possible in Trégorrois because the very strong aspiration of /h/ avoids any confusion with the word 'oil' (eoul).
Finally, future endings are different.
(Compare with the forms -ahomp, -ahet, -ahont of Vannetais, due to the appearance of an -a- elision (pronounced /e/).