**9. Implications of multilingualism and linguistic diversity**


They may cause the mixing of the linguistic codes of different languages, resulting in lexical borrowing and the spreading of some grammatical features among those languages.

vii.**Code switching—**This is a dominant effect of multilingualism. Code switching is the use of two or more codes in the same talk exchange [77]. The speaker uses a switch in code as a tool to negotiate the rights and obligations set which she/he wishes to be in effect for the exchange. The addressee uses the switch as an index of the negotiation in which the speaker is engaged. For instance, in the Kenyan situation [58], speakers change between codes to imply formality, informality, closeness, distance, kinship and also to define human relationships.
