Examining Modularity in Multilingual LMs via Language-Specialized Subnetworks
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Abstract (arXiv)
Recent work has proposed explicitly inducing language-wise modularity in multilingual LMs via sparse fine-tuning (SFT) on per-language subnetworks as a means of better guiding cross-lingual sharing. In this work, we investigate (1) the degree to which language-wise modularity naturally arises within models with no special modularity interventions, and (2) how cross-lingual sharing and interference differ between such models and those with explicit SFT-guided subnetwork modularity. To quantify language specialization and cross-lingual interaction, we use a Training Data Attribution method that estimates the degree to which a model's predictions are influenced by in-language or cross-language training examples. Our results show that language-specialized subnetworks do naturally arise, and that SFT, rather than always increasing modularity, can decrease language specialization of subnetworks in favor of more cross-lingual sharing.
Key facts. Cited by 13 papers in the map (data through 7 Oct 2026). Builds on 38 of its 48 references that are in the map. First posted on arXiv 14 Nov 2023.
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38 of 48 references.
References · 38
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- 2024Exploring Cross-lingual Latent Transplantation: Mutual Opportunities and Open Challengescited by 1
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- 2025Exploring Training Data Attribution under Limited Access Constraints16 Sep 2025
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- 2024Exploring Cross-lingual Latent Transplantation: Mutual Opportunities and Open Challenges17 Dec 2024
- 2024Local Contrastive Editing of Gender Stereotypes23 Oct 2024
- 2024Linguistically Grounded Analysis of Language Models using Shapley Head Values17 Oct 2024
- 2024The Same But Different: Structural Similarities and Differences in Multilingual Language Modeling11 Oct 2024
- 2024Layer Swapping for Zero-Shot Cross-Lingual Transfer in Large Language Models2 Oct 2024
- 2024The Echoes of Multilinguality: Tracing Cultural Value Shifts during LM Fine-tuning21 May 2024
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- 2024The Heuristic Core: Understanding Subnetwork Generalization in Pretrained Language Models6 Mar 2024