That parameter isn't working. https://www.imdb.com/search/title/?title=Beggars+and+Noblemen&primary_languages=en results in a title with English subtitles.

@rootsmusic​ 

I'm not an IMDb employee, so I have few answers.

Frankly, I don't understand where (on what "All Topics" page) the languages are visible.

When I look in the Edit page, there is indeed a listing for English subtitles.

So the search appears to be working fine. 

But seeing why the search came back with this title is not obvious to me.

@bderoes​ It’s because the link which @rootsmusic provided is wrong, this is the correct one -> https://www.imdb.com/search/title/?title=Beggars+and+Noblemen&primary_language=en  (note: primary_language=en NOT primary_languages=en)

You can tell because the heading in my link is:

Title Matching "Beggars and Noblemen", English (Sorted by Popularity Ascending)

when ATS sees a parameter which it does not support, it simply ignores it.

Hope this helps.

@Col_Needham​ 

Silly me, the spelling of the parameter certainly matters.

Am I correct that there's nowhere but the main page to see languages?

Because this title only has one of its languages listed there, despite the dual listing of Arabic in the data (screenshot above).

@bderoes​ Yes, that correct for now, although it is on the list to be addressed when the title subpages are migrated to the new technology. 

No @Peter_pbn, and I didn't contribute this title.