This is a remap button, not a change in their functions. In this case, in the European games, the buttons will get messed up. In games, the buttons work according to the region of the game, which is more important.
I bought a PS4 Japanese region. CUH-1100A B02. Everything works fine, but the buttons O and X are interchanged (X - back, O - enter) and message report on epilepsy in Japanese.
I found the video with the debug settings in PS4 1.76
System>o button behavior. (0:27)
I think this is what I need...