[talloaktrees]

no. code switching is mixing multiple languages, often in a single sentence.

[pizzetta]

That's one definition, but it has expanded into "Both in popular usage and in sociolinguistic study, the name code-switching is sometimes used to refer to switching among dialects, styles or registers" according to(1)

(1)http://www.npr.org/sections/codeswitch/2013/04/08/176064688/...