I want to only see English missions, so I went to custom search and set the language to English, but it turns up no results. Is this not working or am I missing something?
They probably added the filter, but I haven't checked in the Foundry editor yet to see if you can specify what your mission is.
I doubt that the game has automatically detected whatever the mission language is. The authors probably have to go into the editor, choose from a dropdown what the language is and then republish before your search will show anything.
Missions existing before this patch haven't been tagged by their creators as belonging to one language or another. Thus trying to search for those using the language filter will fail. Our editor is awesome, but it's not quite good enough to deduce which language a mission is written in.
If the authors republish the missions and use the dropdown in the editor to select a language, then those missions should show up when searching for missions by language.
Hope that all makes sense.
(EDIT: And if you're reporting a bug, please try to do so in the bug reports forum area--it's the only area of the forum I visit unless someone sends me a link to a thread. )