HiTZ/mt-hitz-eu-es

Hitz Center’s Basque-Spanish machine translation model

Model description

This model was trained from scratch using Marian NMT on a combination of Spanish-Basque datasets totalling 104,417,271 sentence pairs. 12,091,549 sentence pairs were parallel data collected from the web while the remaining 92,325,722 sentence pairs were parallel synthetic data created backtranslating Oscar Spanish monolingual dataset. The model was evaluated on the Flores, TaCon and NTREX evaluation datasets.

• Developed by: HiTZ Research Center & IXA Research group (University of the Basque Country UPV/EHU)
• Model type: traslation
• Source Language: Basque
• Target Language: Spanish
• License: apache-2.0

Intended uses and limitations

You can use this model for machine translation from Basque to Spanish.

At the time of submission, no measures have been taken to estimate the bias and toxicity embedded in the model. However, we are aware that our models may be biased since the corpora have been collected using crawling techniques on multiple web sources.

How to Get Started with the Model

Use the code below to get started with the model.

from transformers import MarianMTModel, MarianTokenizer
from transformers import AutoTokenizer
from transformers import AutoModelForSeq2SeqLM

src_text = ["Hau proba bat da."]

model_name = "HiTZ/mt-hitz-eu-es"
tokenizer = MarianTokenizer.from_pretrained(model_name)

model = AutoModelForSeq2SeqLM.from_pretrained(model_name)
translated = model.generate(**tokenizer(src_text, return_tensors="pt", padding=T
rue))
print([tokenizer.decode(t, skip_special_tokens=True) for t in translated])`

The recommended environments include the following transfomer versions: 4.12.3 , 4.15.0 , 4.26.1

Training Details

Training Data

The Spanish-Basque data collected from the web was a combination of the following datasets:

Dataset	Sentences before cleaning
CCMatrix	6,564,108
MultiParaCrawl	3,344,373
Paracrawl	2,410,895
TranslationMemories_EJ	1,127,141
OpenData2017 (IWSLT18)	926,941
OpenSubtitles	793,593
TranslationMemories_GD	788,776
EhuHac	609,912
OPUS-Elhuyar	642,347
EiTB-ParCC	637,182
WikiMatrix	154,281
Total	** 12,091,549 **

The 92,325,722 sentence pairs of synthetic parallel data were created by backtranslating the EusCrawl Basque monolingual dataset using a previous version (without synthetic parallel data) of the ES-EU translator from the HiTZ center.

Training Procedure

Preprocessing

After concatenation, all datasets are cleaned and deduplicated using bifixer and biclener tools (Ramírez-Sánchez et al., 2020). Any sentence pairs with a classification score of less than 0.5 is removed. The filtered corpus is composed of 100,843,973 parallel sentences.

Tokenization

All data is tokenized using sentencepiece, with a 32,000 token sentencepiece model learned from the combination of all filtered training data. This model is included.

Evaluation

Variable and metrics

We use the BLEU and TER scores for evaluation on test sets: Flores-200, TaCon and NTREX

Evaluation results

Below are the evaluation results on the machine translation from Basque to Spanish compared to Google Translate and NLLB 200 3.3B:

####BLEU scores

Test set	Google Translate	NLLB 3.3B	mt-hitz-eu-es
Flores 200 devtest	22.1	21.3	20.4
TaCON	34.7	31.7	37.7
NTREX	28.8	27.8	26.9
Average	28.5	26.9	28.3

####TER scores

Test set	Google Translate	NLLB 3.3	mt-hitz-eu-es
Flores 200 devtest	59.2	61.6	61.2
TaCON	46.6	51.7	44.6
NTREX	55.5	57.6	57.2
Average	53.8	57.0	54.3

Additional information

Author

HiTZ Research Center & IXA Research group (University of the Basque Country UPV/EHU)

Contact information

For further information, send an email to hitz@ehu.eus

Licensing information

This work is licensed under a Apache License, Version 2.0

Funding

This work is funded by the Ministerio para la Transformación Digital y de la Función Pública - Funded by EU – NextGenerationEU within the framework of the project ILENIA with reference 2022/TL22/00215337, 2022/TL22/00215336, 2022/TL22/00215335 y 2022/TL22/00215334

Disclaimer

Click to expand

The models published in this repository are intended for a generalist purpose and are available to third parties. These models may have bias and/or any other undesirable distortions. When third parties, deploy or provide systems and/or services to other parties using any of these models (or using systems based on these models) or become users of the models, they should note that it is their responsibility to mitigate the risks arising from their use and, in any event, to comply with applicable regulations, including regulations regarding the use of Artificial Intelligence. In no event shall the owner and creator of the models (HiTZ Research Center) be liable for any results arising from the use made by third parties of these models.