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20242026
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cs.CL2026

Parameter Alignment Mitigates Catastrophic Forgetting in Multilingual Expert Language Models

Sanchit Ahuja, Terra Blevins

While continual pretraining~(CPT) is a practical way to extend large language models to new languages, naïve finetuning on targeted data erodes existing capabilities through catast…

cs.CL2025

UPDESH: Synthesizing Grounded Instruction Tuning Data for 13 Indic Languages

Pranjal A. Chitale, Varun Gumma, Sanchit Ahuja +4

Developing culturally grounded multilingual AI systems remains challenging, particularly for low-resource languages. While synthetic data offers promise, its effectiveness in multi…

cs.CL2025

EfficientXLang: Towards Improving Token Efficiency Through Cross-Lingual Reasoning

Sanchit Ahuja, Praneetha Vaddamanu, Barun Patra

Despite recent advances in Language Reasoning Models (LRMs), most research focuses solely on English, even though many models are pretrained on multilingual data. In this work, we…

cs.CL2024

Contamination Report for Multilingual Benchmarks

Sanchit Ahuja, Varun Gumma, Sunayana Sitaram

Benchmark contamination refers to the presence of test datasets in Large Language Model (LLM) pre-training or post-training data. Contamination can lead to inflated scores on bench…

cs.CL2024

Scaling Laws for Multilingual Language Models

Yifei He, Alon Benhaim, Barun Patra +6

We propose a novel scaling law for general-purpose decoder-only language models (LMs) trained on multilingual data, tackling the problem of balancing languages during multilingual…

cs.CL2024

sPhinX: Sample Efficient Multilingual Instruction Fine-Tuning Through N-shot Guided Prompting

Sanchit Ahuja, Kumar Tanmay, Hardik Hansrajbhai Chauhan +9

Despite the remarkable success of large language models (LLMs) in English, a significant performance gap remains in non-English languages. To address this, we introduce a novel app…