some of the non english movies and tvseries doesn't have origin country(null), so i need to make sure is there any field always providing the country name at all?
That is true, there is no default on the origin country field for TV shows. Movies don't have an origin country, only production countries.
If the data hasn't been added, there's no mandatory country field for either media.
can i get the movie details as country wise and original language wise in which the input must be the country code or language code??
I'm not sure what you mean. Can you elaborate as to the problem you're trying to solve, and why this data is important? Giving me some more context can probably help.