This question probes whether two languages may overlap or influence one another in code switching. As we have seen, there is clear
Evidence of crossover between languages in the production domain but only at the phonetic level; phonological categories do not appear to overlap incode switching . In the perceptual domain, there is also reported evidence of cross-linguistic on the processing of acoustic stimuli. In particular, phonological dissimilarity between languages has been shown to have a facilitative effect on both perception and word recognition.