 Jaunius identified the two major dialects – Samogitian and Aukštaitian – based on pronunciation of certain sounds.He then subdivided each dialect into three sub-dialects – Samogitians based on the pronunciation of diphthongs "ie" and "uo" and Aukštaitians based on diphthongs "am", "an", "em", "en" and letter "l" before "ė".Jaunius did not separate out the Dzūkian dialect.