We need the option to be able to exclude foreign films. Or even better, filter by native language. So if I want to remove bollywood films, and all other non English language films I can.
There are too many variables for IMDb to create a listing for each variant someone wants, so they set up the Advanced Title Search so you can roll your own.
This is not perfect, as it shows any film that has any production participation if there is some French spoken, even if neither is primary.
It is possible to select more than one match (e.g. French, English), but these are additive so that combination will select only films that have both English and French listed.
There are ways to exclude selections, but these are not available in the standard interface; they require editing the resulting URL.
To get to Advanced Title Search, you just need to select Advanced Search from the dropdown in the Search bar (normally displays All), then click on the Advanced Title Search text link.