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Hyunsik Kim

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#machine learning Preprint Oct 2026

The Right Byte First: How UTF-16 Helps Multilingual Boundary Prediction

This work trains small causal predictors on matched FineWeb-2 text and evaluates on FLORES-200 under UTF-8, UBE, and UBE's same-length big-endian variant, finding that UBE's mean error falls below UTF-8's final mean error after only 25% and 37.5% of training.

Hyunsik Kim · 0 citations
#machine learning Preprint Oct 2026

Universal Byte-Level Encoding: UTF-8/UTF-16 Routing to Reduce Cross-Script Token-Budget Disparities

Byte-level byte-pair encoding (BBPE) tokenizers are attractive for multilingual large language models (LLMs) because they cover all Unicode text. In UTF-8-based BBPE, however, many scripts start from a higher fallback cost than English: when no learned merges can be applied, a multibyte character requires multiple byte...

Hyunsik Kim, Youngmoon Jung · 1 citation · ⚡1

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