GRDD+: An Extended Greek Dialectal Dataset with Cross-Architecture Fine-tuning Evaluation
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| Main Authors: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866910035091652608 |
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| author | Chatzikyriakidis, Stergios Papadakis, Dimitris Papaioannou, Sevasti-Ioanna Psaltaki, Erofili |
| author_facet | Chatzikyriakidis, Stergios Papadakis, Dimitris Papaioannou, Sevasti-Ioanna Psaltaki, Erofili |
| contents | We present an extended Greek Dialectal Dataset (GRDD+) 1that complements the existing GRDD dataset with more data from Cretan, Cypriot, Pontic and Northern Greek, while we add six new varieties: Greco-Corsican, Griko (Southern Italian Greek), Maniot, Heptanesian, Tsakonian, and Katharevusa Greek. The result is a dataset with total size 6,374,939 words and 10 varieties. This is the first dataset with such variation and size to date. We conduct a number of fine-tuning experiments to see the effect of good quality dialectal data on a number of LLMs. We fine-tune three model architectures (Llama-3-8B, Llama-3.1-8B, Krikri-8B) and compare the results to frontier models (Claude-3.7-Sonnet, Gemini-2.5, ChatGPT-5). |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2511_03772 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | GRDD+: An Extended Greek Dialectal Dataset with Cross-Architecture Fine-tuning Evaluation Chatzikyriakidis, Stergios Papadakis, Dimitris Papaioannou, Sevasti-Ioanna Psaltaki, Erofili Computation and Language We present an extended Greek Dialectal Dataset (GRDD+) 1that complements the existing GRDD dataset with more data from Cretan, Cypriot, Pontic and Northern Greek, while we add six new varieties: Greco-Corsican, Griko (Southern Italian Greek), Maniot, Heptanesian, Tsakonian, and Katharevusa Greek. The result is a dataset with total size 6,374,939 words and 10 varieties. This is the first dataset with such variation and size to date. We conduct a number of fine-tuning experiments to see the effect of good quality dialectal data on a number of LLMs. We fine-tune three model architectures (Llama-3-8B, Llama-3.1-8B, Krikri-8B) and compare the results to frontier models (Claude-3.7-Sonnet, Gemini-2.5, ChatGPT-5). |
| title | GRDD+: An Extended Greek Dialectal Dataset with Cross-Architecture Fine-tuning Evaluation |
| topic | Computation and Language |
| url | https://arxiv.org/abs/2511.03772 |