* Mo n sọ Yorùbá (Mo n so Yoruba) - This is the most common and natural way to say it. It literally translates to "I am speaking Yoruba".
* Mo mọ̀ Yorùbá (Mo mo Yoruba) - This translates to "I know Yoruba". It implies fluency and understanding of the language.
* Mo lè sọ Yorùbá (Mo le so Yoruba) - This translates to "I can speak Yoruba". It emphasizes the ability to communicate in the language.
The best choice depends on the context and the emphasis you want to put on your knowledge of Yoruba.