Unveiling Language Routing Isolation in Multilingual MoE Models for Interpretable Subnetwork Adaptation

arXiv:2604.03592 · cs.CL, cs.AI · Submitted 2026-04-04 · Read on arXiv

cs.CL, cs.AI

Submitted: 2026-04-04

Updated: 2026-08-31

Terminology

• Adaptation — 13× in this paper · explained in 1 episode
• Benchmark — 12× in this paper · explained in 2 episodes
• In Conference on Language Modeling — 11× in this paper
• Low-Resource Languages — 9× in this paper · explained in 4 episodes
• Accuracy — 8× in this paper · explained in 1 episode
• Ablation — 6× in this paper · explained in 1 episode
• Mixture-of-Experts (MoE) — 4× in this paper · explained in 7 episodes
• Sparsity — 4× in this paper · explained in 4 episodes
• Transformer — 4× in this paper · explained in 2 episodes
• Interpretability — 3× in this paper · explained in 15 episodes
• Activation Sparsity — 2× in this paper · explained in 1 episode
• Benchmarking — 2× in this paper · explained in 3 episodes
• Catastrophic Forgetting — 2× in this paper · explained in 5 episodes
• Core — 2× in this paper · explained in 2 episodes
• Decoupling — 2× in this paper · explained in 2 episodes
• Distillation — 2× in this paper · explained in 2 episodes
• Mixture-of-Experts (MoE) Models — 2× in this paper · explained in 3 episodes
• Model Merging — 2× in this paper · explained in 2 episodes
• Routing Isolation-guided Subnetwork Enhancement — 2× in this paper
• Steering — 2× in this paper · explained in 2 episodes
• Ablation Studies — 1× in this paper · explained in 1 episode
• Ablation study — 1× in this paper · explained in 1 episode
• Alignment — 1× in this paper · explained in 1 episode
• Cross-lingual Transfer — 1× in this paper · explained in 2 episodes
• Embeddings — 1× in this paper · explained in 2 episodes
• Fine-Tuning — 1× in this paper · explained in 5 episodes
• Grounding — 1× in this paper · explained in 3 episodes
• LLM judge — 1× in this paper · explained in 2 episodes
• Large Language Models (LLMs) — 1× in this paper · explained in 6 episodes
• Loss Function — 1× in this paper · explained in 2 episodes
• Verification — 1× in this paper · explained in 2 episodes

Sources

• Phi-3 Technical Report: A Highly Capable Language Model Locally on Your Phone
• Understanding Multilingualism in Mixture-of-Experts LLMs: Routing Mechanism, Expert Specialization, and Layerwise Steering
• Crosslingual Capabilities and Knowledge Barriers in Multilingual Large Language Models
• TyDi QA: A Benchmark for Information-Seeking Question Answering in Typologically Diverse Languages
• DeepSeek-V2: A Strong, Economical, and Efficient Mixture-of-Experts Language Model
• DeepSeek-V3 Technical Report
• LoRA: Low-Rank Adaptation of Large Language Models
• Outrageously Large Neural Networks: The Sparsely-Gated Mixture-of-Experts Layer
• Language Models are Multilingual Chain-of-Thought Reasoners
• Let the Expert Stick to His Last: Expert-Specialized Fine-Tuning for Sparse Architectural Large Language Models
• Qwen3 Technical Report

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