So, "to say" would be se ka (literally "that say") and "to say something" would be ka biribi.
Here are some examples:
* Meka sɛ megye. (I say that I am happy.)
* Wɔka sɛ ɛyɛ biribi papa. (They say that it is a good thing.)
* Ɔka sɛ ɔbɛba. (He says that he will come.)
Please note: Twi is a tonal language, meaning that the tone of the word affects its meaning. The pronunciation of "ka" is different depending on its position in a sentence.