YOU SAID:

They don't know what it actually says.

INTO JAPANESE

彼らはそれが実際に何を言っているのか知らない。

BACK INTO ENGLISH

They don't know what it is actually saying.

INTO JAPANESE

彼らはそれが実際に何を言っているのか分からない。

BACK INTO ENGLISH

They don't know what it is actually saying.