Hi! I know that we can filter the endpoint discover by original language, but it would be great to also be able to filter by spoken languages. This is particularly useful to find out films where a minority language is spoken.

For example, in Spain both Galician and Spanish are spoken. Many films are categorized as original language in Spanish, since it's the main language used. However, it would be useful to be able to query for movies where Galician is spoken.

Would it please be possible to add this feature to the backlog? I assume the implementation is easy, since it's already in place for with_original_language, and it would really help out minorities out there!