Tokenization Standards for Linguistic Integrity: Turkish as a Benchmark

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Hauptverfasser: Bayram, M. Ali, Fincan, Ali Arda, Gümüş, Ahmet Semih, Karakaş, Sercan, Diri, Banu, Yıldırım, Savaş
Format: Preprint
Veröffentlicht: 2025
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author Bayram, M. Ali
Fincan, Ali Arda
Gümüş, Ahmet Semih
Karakaş, Sercan
Diri, Banu
Yıldırım, Savaş
author_facet Bayram, M. Ali
Fincan, Ali Arda
Gümüş, Ahmet Semih
Karakaş, Sercan
Diri, Banu
Yıldırım, Savaş
contents Tokenization is a fundamental preprocessing step in NLP, directly impacting large language models' (LLMs) ability to capture syntactic, morphosyntactic, and semantic structures. This paper introduces a novel framework for systematically evaluating tokenization strategies, addressing challenges in morphologically rich and low-resource languages. Using a Turkish dataset of 6,200 multiple-choice questions from the Massive Multitask Language Understanding (MMLU) benchmark, the framework assesses tokenizers across five key metrics: vocabulary size, token count, processing time, language-specific token percentages (\%TR), and token purity. These metrics provide a structured approach to evaluating how well tokenizers preserve linguistic structures. While \%TR measures the proportion of valid words in the target language, \%Pure assesses the alignment of tokens with meaningful linguistic units, such as roots and valid morphemes, minimizing semantic fragmentation. The findings reveal that \%TR, introduced as a critical metric, exhibits a stronger correlation with downstream performance (e.g., MMLU scores) than token purity, emphasizing its role in improving model accuracy. Additionally, larger model parameters do not necessarily yield better tokenization quality or enhanced results, highlighting the importance of tailored tokenization strategies that prioritize linguistic alignment. This framework sets a new standard for developing robust tokenization methods optimized for morphologically complex and low-resource languages. Future work will refine morphological analysis, explore domain-specific customizations, and conduct cross-linguistic evaluations to further enhance tokenization practices.
format Preprint
id arxiv_https___arxiv_org_abs_2502_07057
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Tokenization Standards for Linguistic Integrity: Turkish as a Benchmark
Bayram, M. Ali
Fincan, Ali Arda
Gümüş, Ahmet Semih
Karakaş, Sercan
Diri, Banu
Yıldırım, Savaş
Computation and Language
68T50, 68T10
I.2.7; I.2.6; H.3.1
Tokenization is a fundamental preprocessing step in NLP, directly impacting large language models' (LLMs) ability to capture syntactic, morphosyntactic, and semantic structures. This paper introduces a novel framework for systematically evaluating tokenization strategies, addressing challenges in morphologically rich and low-resource languages. Using a Turkish dataset of 6,200 multiple-choice questions from the Massive Multitask Language Understanding (MMLU) benchmark, the framework assesses tokenizers across five key metrics: vocabulary size, token count, processing time, language-specific token percentages (\%TR), and token purity. These metrics provide a structured approach to evaluating how well tokenizers preserve linguistic structures. While \%TR measures the proportion of valid words in the target language, \%Pure assesses the alignment of tokens with meaningful linguistic units, such as roots and valid morphemes, minimizing semantic fragmentation. The findings reveal that \%TR, introduced as a critical metric, exhibits a stronger correlation with downstream performance (e.g., MMLU scores) than token purity, emphasizing its role in improving model accuracy. Additionally, larger model parameters do not necessarily yield better tokenization quality or enhanced results, highlighting the importance of tailored tokenization strategies that prioritize linguistic alignment. This framework sets a new standard for developing robust tokenization methods optimized for morphologically complex and low-resource languages. Future work will refine morphological analysis, explore domain-specific customizations, and conduct cross-linguistic evaluations to further enhance tokenization practices.
title Tokenization Standards for Linguistic Integrity: Turkish as a Benchmark
topic Computation and Language
68T50, 68T10
I.2.7; I.2.6; H.3.1
url https://arxiv.org/abs/2502.07057