eist-edinburgh/whisper-large-v3-turbo-gaelic-ct2-v2

Fine-Tuned Whisper Large-v3 Turbo for Scottish Gaelic (CTranslate2)

This repository contains the conversion of a fine-tuned Whisper Large-v3 Turbo model for Scottish Gaelic to the CTranslate2 model format.

This model is based on the research presented in the paper "Practitioner’s Guide to Building SR Models for Low-Resource Languages: Case Study on Scottish Gaelic" (Klejch, Lamb, Bell, 2025).

This model can be used in CTranslate2 or projects based on CTranslate2 such as faster-whisper.

Benchmarks & Results

The following results are based on the experiments conducted in the associated paper using the Whisper Turbo architecture. The Word Error Rate (WER) is reported across four test sets: CLTW, News, BBC, and PC (Prògram Choinnich).

Model Configuration	CLTW	News	BBC	PC	Avg WER
Whisper Turbo (LoRA 64)	25.7	23.1	31.5	27.4	26.9
Whisper Turbo (LoRA 512)	20.8	19.2	26.9	21.2	22.0
Whisper Turbo (LoRA 512 + semi-supervised data)	19.4	15.0	23.5	18.1	19.0
Whisper Turbo (Best Config) (full fine-tuning + semi-supervised data)	12.8	10.0	15.9	13.5	13.0

Note: The results above reflect the performance detailed in Table 3 of the paper. Performance may vary depending on the specific checkpoint version and quantization used.

Example Usage

from faster_whisper import WhisperModel

# Load the model
model = WhisperModel("eist-edinburgh/whisper-large-v3-turbo-gaelic-ct2")

# Transcribe a Scottish Gaelic audio file
segments, info = model.transcribe("gaelic_audio.mp3", language="cy")

for segment in segments:
    print("[%.2fs -> %.2fs] %s" % (segment.start, segment.end, segment.text))

Conversion Details

The original model was converted with the following command:

ct2-transformers-converter --model deepdml/whisper-large-v3-turbo --output_dir faster-whisper-large-v3-turbo \
    --copy_files tokenizer.json preprocessor_config.json --quantization float16

Note that the model weights are saved in FP16. This type can be changed when the model is loaded using the compute_type option in CTranslate2.

Citation

If you use this model or the associated results, please cite the original paper:

@inproceedings{klejch25_interspeech,
  title     = {{A Practitioner’s Guide to Building ASR Models for Low-Resource Languages: A Case Study on Scottish Gaelic}},
  author    = {Ondřej Klejch and William Lamb and Peter Bell},
  year      = {2025},
  booktitle = {{Interspeech 2025}},
}

More Information

For more information about the base architecture, see the Whisper Large v3 Turbo model card.

License

The Gaelic Automatic Speech Recognition model and API were developed by the University of Edinburgh with funding from the Scottish Government. They are licensed under the Open Government License v3.0. If you would like to engage with the research team behind the Gaelic Automatic Speech Recognition project, please contact Professor Will Lamb, Personal Chair in Gaelic Ethnology and Linguistics at the University of Edinburgh (w.lamb@ed.ac.uk).