- Add NANOCHAT_LANG environment variable to switch languages
- Implement JapaneseInstructTask and JCommonsenseQA tasks
- Update dataset.py to support Japanese prompts and data loading
- Add Japanese evaluation in chat_eval.py and tok_eval.py
- Include speedrun_spark_ja.sh for Japanese training runs
- Add comprehensive test suite for Japanese support
- Include Kiro specification documents (requirements, design, tasks)
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Co-Authored-By: Claude <noreply@anthropic.com>
