The Impact of Multimodal Digital Resources on Second Language Social Language Ability--A case study of Bilibili education channel

This study takes Bilibili Education Channel as an example to explore the impact mechanism of multimodal digital resources on second language social language proficiency. Through multimodal discourse analysis, combined with systemic functional linguistics and intercultural communication theory, the study analyzed 20 high view video cases and found that modal combinations such as audio-visual collaboration and barrage interaction enhance second language social language abilities through differentiated paths - language teaching videos strengthen users’ academic text analysis skills, while cross-cultural videos deepen cultural adaptability through scene immersion; UP hosts practice building a “cultural intermediary” bridge through language identity, promoting the transformation of static knowledge into dynamic social capital; The “practice feedback” mechanism formed by user comments (cultural phenomenon analysis → group resonance → individual experience internalization) further promotes the shift of social language ability from “heteronomy” to “self-discipline”. The research provides practical insights for optimizing multimodal resource design and language teaching in the digital ecosystem.