I only did ctranslate2 convert to the original.
cmd> ct2-transformers-converter --model NHNDQ/nllb-finetuned-ko2en --quantization float16 --output_dir NHNDQ-nllb-finetuned-ko2en-ct2
All copyrights belong to the original authors and the CT model may be deleted upon request. Below is the original model information.
You can exercise korean data augmentation task with python package
KoTAN