GlossLM: Multilingual Pretraining for Low-Resource Interlinear Glossing
Authors: Michael Ginn (University of Colorado), Lindia Tjuatja (Carnegie Mellon University), Taiqi He (Carnegie Mellon University), Enora Rice (University of Colorado), Graham Neubig (Carnegie Mellon University), Alexis Palmer (University of Colorado), Lori Levin (Carnegie Mellon University)
AI-generated Key Points
- Annotated text in formats like interlinear glossed text (IGT) is crucial for detailed morphosyntactic analyses in a morpheme-by-morpheme format.
- Previous research has focused on automating the generation of IGT to streamline language analysis processes.
- Many languages, especially those needing preservation, lack sufficient IGT data for effective model training.
- Crosslingual transfer has been proposed as a solution to address the lack of IGT data for low-resource languages.
- A comprehensive corpus of over 450k IGT examples across 1.8k languages has been compiled to facilitate research on crosslingual transfer and IGT generation.
- Pretraining a large multilingual model on a portion of the corpus followed by fine-tuning demonstrates competitiveness with state-of-the-art methods for segmented data and large monolingual datasets.
- The model outperforms existing models on unsegmented text and small corpora by up to 6.6% in morpheme accuracy, showcasing the effectiveness of crosslingual transfer for low-resource languages.
- Annotated text aids in preserving minority languages by creating reference materials such as dictionaries and grammars.
- Pretrained models available through platforms like Hugging Face enhance accessibility for researchers and practitioners involved in language documentation efforts.
Abstract: A key aspect of language documentation is the creation of annotated text in a format such as interlinear glossed text (IGT), which captures fine-grained morphosyntactic analyses in a morpheme-by-morpheme format. Prior work has explored methods to automatically generate IGT in order to reduce the time cost of language analysis. However, many languages (particularly those requiring preservation) lack sufficient IGT data to train effective models, and crosslingual transfer has been proposed as a method to overcome this limitation. We compile the largest existing corpus of IGT data from a variety of sources, covering over 450k examples across 1.8k languages, to enable research on crosslingual transfer and IGT generation. Then, we pretrain a large multilingual model on a portion of this corpus, and further finetune it to specific languages. Our model is competitive with state-of-the-art methods for segmented data and large monolingual datasets. Meanwhile, our model outperforms SOTA models on unsegmented text and small corpora by up to 6.6% morpheme accuracy, demonstrating the effectiveness of crosslingual transfer for low-resource languages.
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