---
license: mit
datasets:
- allenai/MADLAD-400
language:
- en
- ru
- bg
- uk
- kk
base_model:
- mistralai/Mistral-7B-v0.1
---
VocADT is a solution for vocabulary adaptation using adapter modules that are trained to learn the optimal linear combination of existing embeddings while keeping the model’s weights fixed.
VocADT offers a flexible and scalable solution without requiring external resources or language constraints.


## New Vocabulary Adapted Models
Only the input/output embeddings are replaced, while all other original weights of base model remain fixed.
These are the merged version: after training the adapters, we merge the original embeddings with the adapter to generate the new embeddings.
| Name | Adapted Model | Base Model | New Vocab Size | Focused Languages |
|---|---|---|---|---|
| VocADT-Latin | [h-j-han/Mistral-7B-VocADT-50k-Latin](https://huggingface.co/h-j-han/Mistral-7B-VocADT-50k-Latin) | [Mistral](https://huggingface.co/mistralai/Mistral-7B-v0.1) | 50k | Swahili (sw), Indonesian (id), Estonian (et), Haitian Creole (ht), English (en)|
| VocADT-Mixed | [h-j-han/Mistral-7B-VocADT-50k-Mixed](https://huggingface.co/h-j-han/Mistral-7B-VocADT-50k-Mixed) | [Mistral](https://huggingface.co/mistralai/Mistral-7B-v0.1) | 50k | Korean (ko), Greek (el), Russian (ru), Bulgarian (bg), English (en) |
| VocADT-Cyrillic | [h-j-han/Mistral-7B-VocADT-50k-Cyrillic](https://huggingface.co/h-j-han/Mistral-7B-VocADT-50k-Cyrillic) | [Mistral](https://huggingface.co/mistralai/Mistral-7B-v0.1) | 50k | Russian (ru), Bulgarian (bg), Ukrainian (uk), Kazakh (kk), English (en) |


## Quick Start
```python
from transformers import AutoModelForCausalLM, AutoTokenizer

# model_name = "mistralai/Mistral-7B-v0.1 # Base Model
model_name = "h-j-han/Mistral-7B-VocADT-50k-Cyrillic" # Vocabulary Adapted Model
tokenizer = AutoTokenizer.from_pretrained(model_name)
model = AutoModelForCausalLM.from_pretrained(model_name)

prefix = "\nEnglish: Hello!\nUkrainian: Добрий день!\nEnglish: How are you?\nUkrainian: Як справи?\nEnglish: "
line = "Do you speak English?"
suffix = f"\nUkrainian:"
prompt = prefix + line + suffix

inputs = tokenizer(prompt, return_tensors="pt")
outputs = model.generate(**inputs, max_new_tokens=7)
print(tokenizer.decode(outputs[0], skip_special_tokens=True))

# Base Model Output: "Чи мовляєш англі"    # Wrong output and need more tokens to complete
# VocADT Output: "Чи розмовляєш ти англійською?" # Complete and good output within 7 tokens
```

## Reference
We provide code in Github repo: https://github.com/h-j-han/VocADT  
Also, please find details in this paper:
```
@misc{han2024vocadt,
      title={Adapters for Altering LLM Vocabularies: What Languages Benefit the Most?}, 
      author={HyoJung Han and Akiko Eriguchi and Haoran Xu and Hieu Hoang and Marine Carpuat and Huda Khayrallah},
      year={2024},
      eprint={2410.09644},
      archivePrefix={arXiv},
      primaryClass={cs.CL},
      url={https://arxiv.org/abs/2410.09644}, 
}
```