BTW hooray is okay there, but 'hip-hip-hooray is discouraged. Germans said hep hep in the hep-hep pogrom of the early 1800s and might have said 'hep hep hurra' during the 3rd Reich. It cuts too closely though, personally I just use bravo to avoid any trouble.
About hip hip, I ended up looking into that when I saw it back then. The connection to the early 1800s riots was made by a single journalist back then, and it was most likely false. More importantly, nobody really makes that connection unless they're trying to.
BTW hooray is okay there, but 'hip-hip-hooray is discouraged. Germans said hep hep in the hep-hep pogrom of the early 1800s and might have said 'hep hep hurra' during the 3rd Reich. It cuts too closely though, personally I just use bravo to avoid any trouble.