How do you say Merry Christmas in Yoruba language?

There isn't a direct equivalent of "Merry Christmas" in Yoruba. However, you can express the sentiment of Christmas greetings in Yoruba in a few ways:

1. Using "E ku ire": This means "Happy holidays" and is a common greeting during the Christmas season.

2. Using "E ku ijoye": This means "Happy celebrations" and can be used to convey the joy of Christmas.

3. Wishing someone a happy birthday of Jesus: You can say "E ku ijoye fun ojo ibi Jesu" which translates to "Happy birthday to Jesus".

4. A more informal greeting: You can also say "O dún Christmas" which roughly translates to "Happy Christmas".

It's important to note that the concept of Christmas isn't as deeply ingrained in Yoruba culture as it is in Western culture. Therefore, these greetings may not be as widely used as they are in other places.