“…Research targeting the impact of nonmajority L1 (e.g., Turkish, Russian, or Slovak in the context of Germany) on the learning of a foreign language in school, which would be a third language (L3) for learners studying in L2‐medium contexts, is growing slowly. However, the ability to speak two or more languages alone does not seem to positively impact L3 acquisition, whereas biliteracy in L1 and L2 does (Rauch, ; Rauch, Naumann, & Jude, ). Following the threshold hypothesis (Cummins, ), the (very) early start of foreign language learning may be an obstacle in L2 development for learners with limited L1 proficiency.…”