Morphosyntactic doubling in language mixing : some puzzles and challenges

In this paper, I will discuss two cases involving morphosyntactic doubling (doubling of possessive clitics and doubling of auxiliaries) in language mixing and show how features of language mixing reflect general principles of syntactic knowledge. The paper is couched in the line of recent work which employs realizational (and post-syntactic) models of morphology in the case of mixing and assumes that language mixing does not require special rules. Multiple exponents to realize particular morpho-syntactic features are more readily allowed if the items come from different languages. Moreover, the type of doubling discussed here will be shown to inform our theories of the syntaxmorphology-PF interface as well as of the timing and ordering of morpho-phonological processes such as Vocabulary Insertion and Linearization.