Netmarble AI Center’s WMT21 Automatic Post-Editing Shared Task Submission

Shinhyeok Oh, Sion Jang, Hu Xu, Shounan An, Insoo Oh


Abstract
This paper describes Netmarble’s submission to WMT21 Automatic Post-Editing (APE) Shared Task for the English-German language pair. First, we propose a Curriculum Training Strategy in training stages. Facebook Fair’s WMT19 news translation model was chosen to engage the large and powerful pre-trained neural networks. Then, we post-train the translation model with different levels of data at each training stages. As the training stages go on, we make the system learn to solve multiple tasks by adding extra information at different training stages gradually. We also show a way to utilize the additional data in large volume for APE tasks. For further improvement, we apply Multi-Task Learning Strategy with the Dynamic Weight Average during the fine-tuning stage. To fine-tune the APE corpus with limited data, we add some related subtasks to learn a unified representation. Finally, for better performance, we leverage external translations as augmented machine translation (MT) during the post-training and fine-tuning. As experimental results show, our APE system significantly improves the translations of provided MT results by -2.848 and +3.74 on the development dataset in terms of TER and BLEU, respectively. It also demonstrates its effectiveness on the test dataset with higher quality than the development dataset.
Anthology ID:
2021.wmt-1.34
Volume:
Proceedings of the Sixth Conference on Machine Translation
Month:
November
Year:
2021
Address:
Online
Venues:
EMNLP | WMT
SIG:
SIGMT
Publisher:
Association for Computational Linguistics
Note:
Pages:
307–314
Language:
URL:
https://aclanthology.org/2021.wmt-1.34
DOI:
Bibkey:
Cite (ACL):
Shinhyeok Oh, Sion Jang, Hu Xu, Shounan An, and Insoo Oh. 2021. Netmarble AI Center’s WMT21 Automatic Post-Editing Shared Task Submission. In Proceedings of the Sixth Conference on Machine Translation, pages 307–314, Online. Association for Computational Linguistics.
Cite (Informal):
Netmarble AI Center’s WMT21 Automatic Post-Editing Shared Task Submission (Oh et al., WMT 2021)
Copy Citation:
PDF:
https://aclanthology.org/2021.wmt-1.34.pdf