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News/Specializing Without Forgetting: Analyzing Knowledge Preservation in Multilingual Model Adaptation
arxiv
PublishedOctober 5, 2026 at 4:00 AM

Specializing Without Forgetting: Analyzing Knowledge Preservation in Multilingual Model Adaptation

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arXiv:2606.00284v2 Announce Type: replace Abstract: While continual pretraining (CPT) is a practical way to extend large language models to new languages, na\"ive finetuning often erodes existing capabilities through catastrophic forgetting. We investigate which model layers drive this trade-off, an

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