Formal:
* Ṣé o le ṣe atunṣe èyí jọ́? (She o le she atun-she eyi jo?) - This is a very polite and formal way to ask for a repetition.
Informal:
* Leti mi o. (Leti mi o) - "Remind me, please."
* Ṣé o le sọ̀rọ̀ náà lẹ́ẹ̀kan sí? (She o le so-ro naa le-e-kan si?) - "Can you say that again please?"
* Ṣé o le tún sọ̀rọ̀ náà? (She o le tun so-ro naa?) - "Can you repeat that?"
To emphasize the request:
* Bẹ́ẹ̀ o, ṣé o le ṣe atunṣe èyí jọ́? (Bee o, she o le she atun-she eyi jo?) - "Please, can you repeat that?"
You can choose the appropriate phrase based on your relationship with the person and the setting.