Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
English idiolect
English idio (confix)
English lect (confix)

English sociolect (mention)
English idiolectic (suffix)
English idiolectical (suffix)
English idiolectal (suffix)
Finnish idiolekti (mention)
French idiolecte (borrowed)
Irish idióileict (borrowed)