Loan-translation is a literal word-for-word translation of both parts of the lending compound, for example, superman derives from the German ‘Übermensch’.
Codeswitching is a speech style unique to bilinguals, in which fluent speakers switch languages between or within sentences, as illustrated by the following sentence.
Recent studies of the social and linguistic properties of codeswitching indicate that it is a marker of bilingualidentity, and has its own internal grammatical structure.