code-switching
action of changing between two or more languages, or language varieties, in the context of a single conversation
en-US/ˈkoʊd - sˈwɪt͡ʃɪŋ/
en-GB/ˈkəʊd - ˈswɪt͡ʃɪŋ/
action of changing between two or more languages, or language varieties, in the context of a single conversation