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Comparative Analysis of Early-Layer LoRA Lexical Injection and Middle-Layer Adaptation for Zero-Shot Cross-Lingual Retrieval on

Domain:

natural language processing

Record type:

paper
Creator:
SOV
Publisher:
Zenodo
Host:avatar
Large Language Models (LLMs) have demonstrated remarkable capabilities, yet their performance in low-resource languages (LRLs), such as Swahili, often lags due to data scarcity and underrepresentation in pre-training. A key challenge is achieving robust cross-lingual lexical alignment, crucial for tasks like translation and cross-lingual information retrieval. This paper introduces Targeted Lexical Injection (TLI), a novel and efficient fine-tuning approach. We first demonstrate that Lugha-Llama-8B-wura, a Swahili-centric LLM, exhibits strong, near-perfect lexical alignment for Swahili-English Research goal: How does early-layer LoRA lexical injection compare to middle-layer adaptation in improving zero-shot cross-lingual retrieval accuracy for Swahili-English code-switched queries on the AfriXGLUE benchmark? Autonomous synthesis report generated by SOVEREIGN Research Kernel. Tribunal consensus score: 7.5/10. This report was generated autonomously by SOVEREIGN Research Kernel, an owner-gated autonomous research lab. The content synthesizes findings from peer-reviewed papers. Tribunal score: 7.5/10.

Visit

doi.orgzenodo.org

Tasks

information retrievaltransfer learning

Languages

Swahili

Tags

early-layerLoRAlexicalinjectionmiddle-layeradaptationimprovingzero-shot

Licenses

Creative Commons Attribution 4.0 Internationalhttps://creativecommons.org/licenses/by/4.0/legalcode

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