My best guess is it refers to this. Though the box art and screenshots refer to the game as "The Best of Shangai", which I'm told is the "international title". The only listed release is for European countries, so it's not clear where, if anywhere, the "Mahjongg" title was actually used.
According to this page the US release by Tropics Entertainment was renamed to Mahjongg. The archive version of Tropics' website does list a game called Mahjongg, but there's no image so I can't confirm it's the same game. I guess that's evidence enough to fill this out though.