Transn’s Submissions to the WMT22 Translation Suggestion Task

This paper describes the Transn's submissions to the WMT2022 shared task on Translation Suggestion.Our team participated on two tasks: Naive Translation Suggestion and Translation Suggestion with Hints, focusing on two language directions Zh→En and En→Zh.Apart from the golden training data provided by the shared task, we utilized synthetic corpus to fine-tune on DeltaLM (∆LM), which is a pretrained encoder-decoder language model.We applied two-stage training strategy on ∆LM and several effective methods to generate synthetic corpus, which contribute a lot to the results.According to the official evaluation results in terms of BLEU scores, our submissions in Naive Translation Suggestion En→Zh and Translation Suggestion with Hints (both Zh→En and En→Zh) ranked 1st, and Naive Translation Suggestion Zh→En also achieved comparable result to the best score.