@inproceedings{zhang-deng-2026-nrd,
title = "{NRD}: A Hybrid Disentanglement Framework for Mitigating Interference in Multilingual Machine Translation",
author = "Zhang, Jiarui and
Deng, Yifan",
editor = "Piperidis, Stelios and
Bel, N{\'u}ria and
van den Heuvel, Henk and
Ide, Nancy and
Krek, Simon and
Toral, Antonio",
booktitle = "Proceedings of the Fifteenth Language Resources and Evaluation Conference",
month = may,
year = "2026",
address = "Palma de Mallorca, Spain",
publisher = "ELRA Language Resource Association",
url = "https://aclanthology.org/2026.lrec-1.677/",
doi = "10.63317/55wnhwvmezwx",
pages = "8577--8586",
abstract = "Negative interference from cross-lingual conflicting syntactic patterns is a primary obstacle in Multilingual Neural Machine Translation (MNMT). We trace this problem to the entanglement of transferable, universal semantics with non-transferable, language-specific syntactic structures. Existing methods, relying on disjoint training-only specialization or inference-only filtering, fail to fully resolve this fundamental entanglement. To address this, we propose NRD (Neuron Representation Disentanglement), a two-stage hybrid framework that couples training-time specialization with inference-time filtering. First, a Specialization Fine-tuning stage identifies functional neurons via a semantic-invariant activation-variance metric and reinforces intrinsic modularity through sparse updates. Second, a Dynamic Representation Filtering stage purifies semantic representations at inference by adaptively suppressing syntax-sensitive neurons, guided by each language{'}s pre-computed gradient consistency. On the OPUS-100 benchmark, NRD outperforms strong baselines, achieving an average gain of +1.9 BLEU on supervised directions. On the WMT-10 zero-shot benchmark, it obtains a substantial +7.1 BLEU, demonstrating robust cross-lingual generalization. These results provide strong evidence that our hybrid approach effectively purifies semantic representations by mitigating syntactic interference, paving the way for more robust cross-lingual generalization."
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<abstract>Negative interference from cross-lingual conflicting syntactic patterns is a primary obstacle in Multilingual Neural Machine Translation (MNMT). We trace this problem to the entanglement of transferable, universal semantics with non-transferable, language-specific syntactic structures. Existing methods, relying on disjoint training-only specialization or inference-only filtering, fail to fully resolve this fundamental entanglement. To address this, we propose NRD (Neuron Representation Disentanglement), a two-stage hybrid framework that couples training-time specialization with inference-time filtering. First, a Specialization Fine-tuning stage identifies functional neurons via a semantic-invariant activation-variance metric and reinforces intrinsic modularity through sparse updates. Second, a Dynamic Representation Filtering stage purifies semantic representations at inference by adaptively suppressing syntax-sensitive neurons, guided by each language’s pre-computed gradient consistency. On the OPUS-100 benchmark, NRD outperforms strong baselines, achieving an average gain of +1.9 BLEU on supervised directions. On the WMT-10 zero-shot benchmark, it obtains a substantial +7.1 BLEU, demonstrating robust cross-lingual generalization. These results provide strong evidence that our hybrid approach effectively purifies semantic representations by mitigating syntactic interference, paving the way for more robust cross-lingual generalization.</abstract>
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%0 Conference Proceedings
%T NRD: A Hybrid Disentanglement Framework for Mitigating Interference in Multilingual Machine Translation
%A Zhang, Jiarui
%A Deng, Yifan
%Y Piperidis, Stelios
%Y Bel, Núria
%Y van den Heuvel, Henk
%Y Ide, Nancy
%Y Krek, Simon
%Y Toral, Antonio
%S Proceedings of the Fifteenth Language Resources and Evaluation Conference
%D 2026
%8 May
%I ELRA Language Resource Association
%C Palma de Mallorca, Spain
%F zhang-deng-2026-nrd
%X Negative interference from cross-lingual conflicting syntactic patterns is a primary obstacle in Multilingual Neural Machine Translation (MNMT). We trace this problem to the entanglement of transferable, universal semantics with non-transferable, language-specific syntactic structures. Existing methods, relying on disjoint training-only specialization or inference-only filtering, fail to fully resolve this fundamental entanglement. To address this, we propose NRD (Neuron Representation Disentanglement), a two-stage hybrid framework that couples training-time specialization with inference-time filtering. First, a Specialization Fine-tuning stage identifies functional neurons via a semantic-invariant activation-variance metric and reinforces intrinsic modularity through sparse updates. Second, a Dynamic Representation Filtering stage purifies semantic representations at inference by adaptively suppressing syntax-sensitive neurons, guided by each language’s pre-computed gradient consistency. On the OPUS-100 benchmark, NRD outperforms strong baselines, achieving an average gain of +1.9 BLEU on supervised directions. On the WMT-10 zero-shot benchmark, it obtains a substantial +7.1 BLEU, demonstrating robust cross-lingual generalization. These results provide strong evidence that our hybrid approach effectively purifies semantic representations by mitigating syntactic interference, paving the way for more robust cross-lingual generalization.
%R 10.63317/55wnhwvmezwx
%U https://aclanthology.org/2026.lrec-1.677/
%U https://doi.org/10.63317/55wnhwvmezwx
%P 8577-8586
Markdown (Informal)
[NRD: A Hybrid Disentanglement Framework for Mitigating Interference in Multilingual Machine Translation](https://aclanthology.org/2026.lrec-1.677/) (Zhang & Deng, LREC 2026)
ACL