From a constructional perspective, foreign language acquisition is presumed to be more complex than L1 acquisition because of the competition between the specific constructions of the foreign language with the L1 constructions, which can lead to “constructional transferâ€. Applying the constructional transfer hypothesis to the acquisition of intensifying constructions in English and in Dutch by Belgian French-speaking secondary school pupils, we expect to find i) underuse of typical Germanic means of intensification such as elative compounds and ii) overuse of syntactic constructions frequently used in French, like adverbial modification and adjectival reduplication. A comparison will be drawn between pupils enrolled in traditional foreign language education and pupils in Content and Language Integrated Learning (CLIL). As CLIL programs can be considered closer to L1 acquisition because of their inherent usage-based approach, we expect a more native-like acquisition of intensifying constructions by CLIL pupils.