agglutinative-languages

This paper presents QuechuaTok, a benchmark for evaluating tokenization strategies for Southern Quechua, and introduces Morphological Boundary Accuracy (MorphAcc) as a necessary metric. It shows that BPE achieves low fertility but poor morphological accuracy, while a morphology-aware PRPE tokenizer achieves 83% MorphAcc, demonstrating that fertility rate alone is insufficient for agglutinative languages.