It is claimed that bilingual children have two separate linguistic systems from early ages. Over the past decades, linguists carried out a number of studies to test the validity of the claim. They explored bilingual children’s code-mixing in correlation with a variety of linguistic elements, such as lexicon, syntax, phonology in different contexts, concluding that bilingual children had separate
... [Show full abstract] linguistic system for each language. Although there were certain limitations in these studies, most of their results supported the statement.