This chapter investigates cross-national aspects of design thinking, with a focus on three themes: design cognition, complexity and spatial language. The chapter uses a new method, a dual coding system (design cognition and language) for protocol data combined with linkography. This system rigorously captures both cognitive and linguistic characteristics of the design process. This method is applied to analyse parametric design processes undertaken by a set of Australian and Swedish designers. Through this analysis and the discussion of its results, the chapter contributes to the in-depth exploration of multiple aspects of cross-national design and cultural design thinking.