Papers › PyMarian: Fast Neural Machine Translation and Evaluation in Python

PyMarian: Fast Neural Machine Translation and Evaluation in Python

15 Aug 2024arXiv:2408.11853archive 2025-07-28

Thamme Gowda, Roman Grundkiewicz, Elijah Rippeth, Matt Post, Marcin Junczys-Dowmunt

The deep learning language of choice these days is Python; measured by factors such as available libraries and technical support, it is hard to beat. At the same time, software written in lower-level programming languages like C++ retain advantages in speed. We describe a Python interface to Marian NMT, a C++-based training and inference toolkit for sequence-to-sequence models, focusing on machine translation. This interface enables models trained with Marian to be connected to the rich, wide range of tools available in Python. A highlight of the interface is the ability to compute state-of-the-art COMET metrics from Python but using Marian's inference engine, with a speedup factor of up to 7.8× the existing implementations. We also briefly spotlight a number of other integrations, including Jupyter notebooks, connection with prebuilt models, and a web app interface provided with the package. PyMarian is available in PyPI via pip install pymarian.

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