Lezgi is a synonym of lezghi.

Lezgi is a alternative form of lezghi.

As nouns the difference between lezghi and lezgi

is that lezghi is alternative form of Lezgi while Lezgi is a member of an ethnic group living predominantly in southern Dagestan and northeastern Azerbaijan.

As proper nouns the difference between lezghi and lezgi

is that lezghi is alternative form of Lezgi while Lezgi is the Northeast Caucasian language spoken by these people.

As an adjective Lezgi is

of or pertaining to the Lezgi people, their culture or language.