The universality of syntactic constraints on Spanish–English codeswitching in the USA

In many bilingual communities, speakers use both of their languages in a single sentence1:

(1) English/Spanish in New York (Sankoff & Poplack, 1981, p. 5)

So you todavía haven’t decided lo que vas a hacer next week. ‘So you haven’t decided yet what you are going to do next week’.