superstratum

One layer or stratum superimposed on another.

The language of a later, invading people imposed on and leaving features in an indigenous language.

A stratum or layer above another, or resting on something else.

A stratum, or layer, above another.

A stratum that is on top of another

A language imposed upon a population that previously spoke another language

any stratum or layer superimposed on another

the language of a later invading people that is imposed on an indigenous population and contributes features to their language