README.md

# CC3M-eu (Basque Translation)

## 📚 Overview
**CC3M-eu** is a Basque version of the **Conceptual Captions 3M** dataset. It consists of approximately 3.3 million image-description pairs where the original English captions have been translated into Basque using the **mt-hitz-en/eu** specialized translation pipeline.

**Important:** This is **not the official dataset**. It is an independent community translation effort designed to facilitate the training of Vision-Language Models (VLMs) and CLIP-style encoders for the Basque language.

## ✍️ Authors & Acknowledgements
- **Original dataset:** *Conceptual Captions* — © Google LLC
- **Basque translation & curation:** <Lukas Arana / HiTZ>, 2025
- **Translation Engine:** Neural Machine Translation via `mt-hitz-en/eu` (HiTZ Center).

If you use this Basque split, please cite both the original Conceptual Captions paper and this translation work.

## 📁 Dataset Schema
The schema has been adapted to include both the source and the translated content:
1. **id**: Unique identifier for each sample.
2. **url**: The original source URL for the image.
3. **caption_en**: The original English description.
4. **caption_eu**: The generated Basque translation.



## 🔧 How We Built It
1. **Extraction**: English captions were pulled from the official CC3M TSV files.
2. **Translation**: Each caption was translated using the `mt-hitz-en/eu` model, which is specifically optimized for English-to-Basque scientific and general domain text.
3. **Cleanup**: Applied basic post-processing to handle HTML entities and formatting artifacts.

*Note: No images were hosted or modified; only the textual metadata is provided.*

## 🚦 Limitations & Ethical Considerations
- **Non-official**: This version has not been audited by Google; semantic drift may occur during translation.
- **Link Stability**: Like the original CC3M, many image URLs may be dead or lead to 404 errors.
- **Biases**: The dataset may inherit or amplify social biases present in the original English data or the NMT model.

## 💻 Quick Start
```python
from datasets import load_dataset

# Load the Basque CC3M dataset
ds = load_dataset("lukasArana/CC3M-eu", split="train")

# Accessing a sample
print(ds[0]["caption_eu"])