Using simple transformer seq2seq I have downloaded Helsinki-NLP/opus-mt-mul-en which work best in our case and using specific Seq2SeqArgs to set arguments of model.

Args

• num_train_epochs = 35
• batch_size = 32
• max_length = 120
• src_lang ="yor"
• tgt_lang ="en_XX"

https://github.com/kingabzpro/Yoruba-Machine-Translation