Language synchronization north and south of the Brenner pass: modeling the continuum.

The term Sprachbund refers to the convergence of typologically different languages in the same region and represents an interesting challenge to the notion of parameter conceived as a fixed value of a core syntactic option, i.e. ±null subjects. This contrast could be resolved by the methodological differentiation between surface forms and structural differences. Analyzing the status of clitic subjects and the effects of the so called “that-trace filter” in both Northern Italian and Bavarian dialects we will observe that continua primarily refer to surface forms – i.e. linear word orders – whereas the core option of a given (macro)parameter captures basic typological differences. In this perspective, we revisit the traditional Wellentheorie as a prototypical approach to analyze contact phenomena.