Write an assignment on the cost of language switch of billinguals. The paper takes a thrust at an evaluation of researches from a largely psychology approach detailing various experimentation outcomes that shed light into the dynamics of the complexities of switching language for the bilinguals. This paper culminates in form of a discussion and suggestions to the educators and for the bodies of knowledge covering the entirety of the spectrum of stakeholders in the language learning and acquisition and domains particularly for bilingualsBilingual speakers normally have to shift across the two languages in their communication activity and particularly in speech production. The fundamental fact here is that the bilinguals have to separate their two languages and settle for the appropriate lexical alternative. one language for effective communication purposes. Abutalebi J et al 2007) note that in the sense of the foregoing, the process entails that the bilinguals have to be possession of effective neural mechanisms that will suffice to facilitate smooth switching and to avert the highly likely chances of interference or the probable competition between the two language alternatives.This is particularly so considering the fact that the first and second languages both posses protruding neuro-anatomical bases as illuminated by the topical neuro-imaging researches. Bilinguals have to possess feasible lexical selection. This highlights the dynamics that characterise the process in which bilinguals have to go through in the techniques of switching between languages. The switch demands various neural mechanisms and facilities which have been illumined by various researches and propounded models. The broad range of varying challenges or costs that a bilingual incurs in the process of switching between languages demands a deeper exploration. The process evidently involves various psychological transitions and processes which will be explored in this study.