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How to Do Monolingual, Multilingual, and Cross-lingual Text Classification in April, 2024
Learn effective strategies for text classification across languages: monolingual fine-tuning, multilingual models, translation techniques, and LLM prompting approaches.
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For monolingual text classification, fine-tuning language models remains a strong baseline solution compared to using prompting with LLMs
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Cross-lingual classification can be achieved through multiple approaches:
- Translating training data to target language
- Using multilingual language models with adapters
- Back-translation techniques
- Prompting multilingual LLMs
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Model selection considerations:
- Open source options (BERT, T5, Mistral) vs closed source (GPT)
- Model size vs computational resources
- Language coverage in pre-training data
- Task-specific requirements
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Adapter-based fine-tuning provides an efficient approach for multilingual tasks:
- Requires less computational resources
- Allows freezing base model layers
- Enables language-specific adaptations
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Translation quality significantly impacts cross-lingual performance:
- DeepL showed strong results for translation tasks
- Consider language family relationships when choosing translation paths
- Multiple translation steps can compound errors
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Data considerations:
- Balance datasets across languages and classes
- Account for morphological differences between languages
- Consider domain-specific vocabulary and context
- Leverage existing multilingual datasets when available
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LLM prompting strategies:
- Use clear, consistent prompt formats
- Include task-specific instructions
- Consider few-shot examples
- Restrict output format for classification tasks
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Evaluation metrics and benchmarks:
- Cross-check model performance across languages
- Compare against monolingual baselines
- Use standardized benchmarks like LLM leaderboards
- Consider practical deployment constraints