It’s set to English. As I pointed out, the problem is visible on the web version itself. It appears they haven’t changed, when other titles were added, unlike most titles would. The correct name of the Killing Heydrich one, doesn’t even show up on the website version and this is the name used almost everywhere.
I know the site has issues sometimes with information changing. I pointed this out myself, at one point, where items for example, that had multiple IDs would use an old one and not the new one.
I figured maybe something similar is going on here. They aren’t updating to proper International titles. It appears that normally, all titles would at least be searchable (For example Rory O’Shea Was Here also works if you search Inside I’m Dancing.
Not having the correct title even show up seems like a problem.