Same old de ja vu

Have you already had a de ja vu? Sure, you have. Some people have them rather rarely, some often. But there are people who are having them all the time and I’m one of them. When I was a kid, I thought those were memories from my past lives or glitches in the Universe making two parallel worlds clash and the same events repeat themselves :) And many people actually share this point of view! I read a lot about unexplainable situations when people suddenly started speaking a language they never learned or talking about places they’ve never been to. For instance, one man was put into a trance and imagined himself a different person - a sailor living in the 16th century. He even gave a detailed description of the ship he sailed on that matched historical evidence and used a jargon typical for people of his occupation from that epoch. How can official science explain that?.. It’s interesting, though, that Wikipedia only gives two explanations for de ja vu - memory-based and dream-based: https://en.wikipedia.org/wiki/Déjà_vu. I don’t believe that much in all the mystical stuff anymore, but who knows… At least, it can be somehow connected with the collective unconscious. We can be simply picking up memories of other people from our shared ‘server.’ It doesn’t sound very antiscientific :) What do you think about that?