Bank of terms

34. Language interference
Language or linguistic interference is often perceived as a transfer. As it is well known, interference involves the avoidance of an individual's speech in the other language as a result of the influence of the mother tongue on the language spoken at all levels.
35. Language contact		Language contact occurs when speakers of two or more languages or varieties interact and influence each other. The study of language contact is called contact linguistics. When speakers of different languages interact closely, it is typical for their languages to influence each other. Language contact can occur at language borders, between adstratum languages, or as the result of migration, with an intrusive language acting as either a superstratum or a substratum
36. Mixed language		A mixed language is a language that arises among a bilingual group combining aspects of two or more languages but not clearly deriving primarily from any single language. It differs from a creole or pidgin language in that, whereas creoles/pidgins arise where speakers of many languages acquire a common language, a mixed language typically arises in a population that is fluent in both of the source languages.
37. Adstratum		a language or group of elements within it that is responsible for changes in a neighbouring language.
38. Superstratum		a set of features of a language traceable to the influence of a language formerly spoken within the same society by a dominant group:English has a Norman-French superstratum
39. Substratum		a component of a language (such as a part of its phonology, syntax, or lexicon) that remains from absorption of a pre-existing language in the region where the language is currently spoken