I’ve always been a fan of language with evidentialism in their grammars. This is not the only such language.

Some have it only when talking about past tense. There might be, for example, five categories of where you knew the thing from. If all language were unable tell about things in the past tense without implying where they know the information from, populists would never end up in charge of any country. You can’t make people afraid of foreigners if you cannot imply that you are talking about your own experience without outright saying aloud that they are.