How do you say My Yoruba is bad in language?

Here are a few ways to say "My Yoruba is bad" in Yoruba, depending on the nuance you want to convey:

Formal:

* Yoruba mi ko dáadáa (My Yoruba is not good)

* Yoruba mi burú (My Yoruba is bad)

Informal:

* Yoruba mi kò gbona (My Yoruba is not hot/fluent)

* Yoruba mi kò sàn (My Yoruba is not good)

* Yoruba mi gbọ́ngbọ́ngbọ́ng (My Yoruba is weak/not strong)

With humility:

* Mo ti ní ìfẹ́ lati kọ́ Yoruba, ṣugbọn Yoruba mi kò ti de ibi (I have been trying to learn Yoruba, but my Yoruba is not yet there)

* Mo ní lati ṣe àtúnṣe gbogbo Yoruba mi (I need to improve my Yoruba)

Note: "Yoruba mi" means "my Yoruba," and can be used as a short form for "my knowledge of Yoruba."

Remember that the best choice will depend on the context of your conversation and the relationship you have with the person you're speaking to.