# GRDD+: An Extended Greek Dialectal Dataset with Cross-Architecture Fine-tuning Evaluation

arXiv: https://arxiv.org/abs/2511.03772 · HTML: https://mlsanity.com/paper/2511.03772/

## Key facts

- Cited by 3 papers in the map (data through 14 Oct 2026).
- Builds on 4 of its 17 references that are in the map.
- First posted on arXiv 5 Nov 2025.

## Builds on (most cited first, 4 of 4)

- [DIALECTBENCH: A NLP Benchmark for Dialects, Varieties, and Closely-Related Languages](https://mlsanity.com/paper/2403.11009/) (2024)
- [Krikri: Advancing Open Large Language Models for Greek](https://mlsanity.com/paper/2505.13772/) (2025)
- [Part-of-Speech Tagging on an Endangered Language: a Parallel Griko-Italian Resource](https://mlsanity.com/paper/1806.03757/) (2018)
- [GRDD: A Dataset for Greek Dialectal NLP](https://mlsanity.com/paper/2308.00802/) (2023)

## Built on by (most cited first, 3 of 3)

- [The Hrunting of AI: Where and How to Improve English Dialectal Fairness](https://mlsanity.com/paper/2603.15187/) (2026)
- [Maistros: A Greek Large Language Model Adapted Through Knowledge Distillation From Large Reasoning Models](https://mlsanity.com/paper/2605.01870/) (2026)
- [Svarna: An Open Corpus Workbench for Modern Greek](https://mlsanity.com/paper/2607.00970/) (2026)

## Abstract (arXiv)

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).