Abstract
Contact between Catalan and Spanish can lead to processes of linguistic convergence, resulting in their respective grammar systems becoming more similar. The main aim of this paper is to present the grammatical peculiarities of Spanish spoken in Catalonia that differentiate it from other Spanish-speaking areas, which can be explained through the linguistic contact with Catalan. More specifically, we will deal with markers in interrogative sentences, deictic markers, the morphological marking of future in contexts in which standard Spanish would not employ this tense, the deontic sense of haber de + infinitive and the specific use of discourse markers. In order to assess when differences between Spanish in Catalonia and other monolingual areas began to be documented, a panchronic approach has been adopted.