I'm one of the users who spends the time researching and translating things to include on those wiki pages. Yet nearly all the Sakamichi pages are exactly the same between here and Wiki48. And I notice when I google members and I see the results pulling up the exact same phrases (including Japanese ones) between both pages.
It's really not that hard to find your own separate information. It's probably less effort that copying and pasting everything over and over.
Someone already made a post about this further down but I hope that whoever is doing this for the Sakamichi groups notices and stops, AND removes the copied info.