Challenge: Existing large language models are notoriously English-centric, and their performance has been reported to drop significantly in lessresourced languages.
Approach: They propose a language-agnostic benchmark for in-context learning that reveals catastrophic forgetting early on CPT when English is not included.
Outcome: The proposed method does not impact validation perplexity but is critical for emergence of downstream capabilities in the target language.

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Breaking Language Barriers: Cross-Lingual Continual Pre-Training at Scale (2024.emnlp-main)

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Challenge: Large Language Models (LLMs) have made significant strides towards Artificial General Intelligence, but training them from scratch is prohibitively expensive.
Approach: They propose to continuously pre-train LLMs from existing pre-trained LLM models by using a set of parameters instead of randomly initializing them.
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Disentangling Continued Pre-Training: Attention-Driven Routing and Semantic Hub Preservation in Language Adaptation (2026.findings-acl)

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Challenge: Continued Pre-Training (CPT) enables Large Language Models (LLMs) to acquire second-language capabilities, yet the mechanisms underlying CPT remain poorly understood.
Approach: They investigate how CPT adapts model representations across diverse language families and scripts, model sizes, and architectures.
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Adaptation Odyssey in LLMs: Why Does Additional Pretraining Sometimes Fail to Improve? (2024.emnlp-main)

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Challenge: In the last decade, the generalization and adaptation abilities of deep learning models were evaluated on fixed training and test distributions.
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Towards Effective and Efficient Continual Pre-training of Large Language Models (2025.acl-long)

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Challenge: Continual pre-training (CPT) has been an important approach for adapting language models to specific domains or tasks.
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Outcome: The proposed method can greatly improve Chinese language ability and scientific reasoning ability of LLMs.
Are Emergent Abilities in Large Language Models just In-Context Learning? (2024.acl-long)

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Challenge: Large language models have been claimed to acquire certain capabilities without having been specifically trained on them.
Approach: They propose a theory that explains emergent abilities by taking into account their potential confounding factors and rigorously substantiate this theory through over 1000 experiments.
Outcome: The proposed theory proves that emergent abilities are not truly emergental, but result from a combination of in-context learning, model memory, and linguistic knowledge.
Continued Pretraining and Interpretability-Based Evaluation for Low-Resource Languages: A Galician Case Study (2025.findings-acl)

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Challenge: Recent advances in large language models have led to remarkable improvements in language understanding and text generation.
Approach: They propose a framework to evaluate large language models for underrepresented languages . they examine CPT strategies for languages with limited representation in multilingual models .
Outcome: The proposed evaluation framework is based on the case of Galician language . it assesses trade-offs between linguistic enrichment and task-solving capabilities .
AfriqueLLM: How Data Mixing and Model Architecture Impact Continued Pre-training for African Languages (2026.acl-long)

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Challenge: Continued pretraining (CPT) is a practical route to language adaptation, but improvements on demanding capabilities such as mathematical reasoning are limited.
Approach: They propose to use CPT to adapt large language models to African languages . they use math, code, and synthetic translated data to analyze their models .
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Emergent Abilities in Reduced-Scale Generative Language Models (2024.findings-naacl)

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Challenge: Large language models can solve new tasks without task-specific fine-tuning.
Approach: They propose to use pre-training data to pre-train 36 language models with billions of parameters to investigate whether emergent properties are tied to model size or can be demonstrated by smaller models.
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A Survey of Post-Training Scaling in Large Language Models (2025.acl-long)

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Challenge: Large language models (LLMs) have demonstrated proficiency in understanding and generating human natural languages.
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Outcome: The proposed model can be used to understand and generate human natural languages.
Crosscoding Through Time: Tracking Emergence & Consolidation Of Linguistic Representations Throughout LLM Pretraining (2026.acl-long)

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Challenge: Large language models learn non-trivial abstractions during pretraining, but it is not well understood when and how these specific linguistic abilities emerge.
Approach: They propose a method to track the evolution of linguistic features during pretraining by using sparse crosscoders to discover and align features across model checkpoints.
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