Performance of Targeted Lexical Injection versus Fine-Tuning and Adapters in XTREME-R Cross-Lingual Retrieval

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 the performance of Targeted Lexical Injection (TLI) compare to full fine-tuning and adapter-based methods on the XTREME-R benchmark for cross-lingual retrieval in low-resource language pairs like Swahili-English?

Autonomous synthesis report generated by Assignee Research. Tribunal consensus score: 7.5/10.