Challenge: Existing studies have shown that a small subset of parameters is highly effective in fine-tuning . prior work shows that there are a few additional parameters corresponding to an intrinsic dimension in a well-trained Large Language Model.
Approach: They propose a method to identify a small subset of LLM parameters highly effective in multilingual fine-tuning.
Outcome: The proposed method can find the certified winning tickets in the embedding layer, and fine-tuning on the found parameters is guaranteed to perform as well as full fine- tuning.

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Challenge: Existing studies on pre-trained language models show that they can fine-tune parameters but achieve good downstream performance.
Approach: They find that a dominant winning ticket takes up 0.05% of the parameters and is transferable across different tasks.
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PLEX: Adaptive Parameter-Efficient Fine-Tuning for Code LLMs using Lottery-Tickets (2025.naacl-industry)

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Challenge: PLEX is a lottery-ticket based parameter-efficient fine-tuning method that adapts large language models to well-supported and underrepresented programming languages (PLs) in pretraining.
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Robust Lottery Tickets for Pre-trained Language Models (2022.acl-long)

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Challenge: Recent studies have shown that pre-trained language models contain smaller matching subnetworks that are not robust to adversarial examples.
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Multilingual Lottery Tickets to Pretrain Language Models (2023.findings-emnlp)

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Challenge: Multilingual pretrained language models (mPLMs) have become the de-facto standard for multilingual tasks.
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Composable Sparse Fine-Tuning for Cross-Lingual Transfer (2022.acl-long)

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Challenge: Adapters and sparse fine-tuning have been developed to improve transfer learning . a number of approaches have been proposed to improve performance of fine-untuners .
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Discovering Language-neutral Sub-networks in Multilingual Language Models (2022.emnlp-main)

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Challenge: a recent study shows that multilingual pre-trained language models transfer well on cross-lingual downstream tasks.
Approach: They conceptualize language neutrality as a function of overlap between language-encoding sub-networks of multilingual models.
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Exploring Lottery Prompts for Pre-trained Language Models (2023.acl-long)

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Challenge: Existing approaches to optimize pre-trained language models are expensive and slow to scale.
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Prompts Can Play Lottery Tickets Well: Achieving Lifelong Information Extraction via Lottery Prompt Tuning (2023.acl-long)

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Challenge: Existing research on information extraction tasks focuses on one specific task, but in real-world scenarios, new data of different IE tasks and domains come in a stream over time.
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How to Improve LLMs’ Performance on Specific Languages: A Perspective on LLM-Derived Language Similarity (2026.acl-long)

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Challenge: Large language models (LLMs) exhibit uneven performance across languages.
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Super Tickets in Pre-Trained Language Models: From Model Compression to Improving Generalization (2021.acl-long)

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Challenge: 'lottery tickets' can be trained to match the performance of a full model . subnetwork training can also outperform random sampled subnetworks of the same size .
Approach: They propose to train a subnetwork of 'lottery tickets' to match the full model's performance.
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