Using a 219,536 word Dutch-Turkish digital data corpus compiled from bilingual internet fora, this paper describes both macro-sociolinguistic language choice patterns as well as micro-linguistic contact features in bilingual data, comparing both macro and micro results with what is known from the sociolinguistic literature in general, and Turkish-Dutch code switching and contact linguistic literature in particular. The data are investigated qualitatively and quantitatively, with a focus on the inquiry of densely bilingual data of the type that has been called in the literature ‘mixed language’ (Auer, 1999). It is argued that data of this type should display a certain degree of predictability since it is usually perceived of as the most easy way of speaking by its users. It is shown that repeated patterns can be found in the data, on both explored levels, as well as in code switching patterns, and lexico-semantic choices, and it is argued that in these patterns principles of openness and frequency of exposure may be an declaratory factor.