"That person has been saying really interesting things."

Translation: Ten člověk říká opravdu zajímavé věci.

[JanisaChatte]

Why not "velmi zajímavé"?

[JanLyko]

"Really" and "very" became nearly identical in English, while in Czech "opravdu" has certain personal / sincere dimension.

[Paul440375]

That would be "very interesting". I guess the meaning is the same, but you should always aim for the most accurate translation.

[Plat_]

"Velmi" is "very" and "opravu" is "really".

[Axlex99Alinek]

I am Czech myself and I am not Mr. Correct, but isn't "říká" a word which takes place in current time therefore shouldn't it be "is saying" or be translated to "říkal" (past verb)?

[VladaFu]

"has been saying" is the present perfect tense

"is saying" is, of course, accepted too.

[Ron469890]

Isn't "has been" past tense?

[VladaFu]

present perfect