Template:YYY0s in nationality cinema category header/doc

Use this to create a category of the form "YYY0s in nationality cinema", where YYY0s is a 4-digit decade

e.g.
 * Category:1950s in French cinema
 * Category:1990s in Japanese cinema

Normal usage
The normal usage requires no parameters, because the template looks up the other data.

e.g. on Category:1960s in Australian cinema, no parameters are needed

The other needed data is:
 * 1) the adjectival form of the country in which the country is located. This is looked up by Template:GetAdjectiveFromCountryName

If this lookups fails, then an error is reported unless the required data is supplied by an optional parameter.

That may be due to this category being misnamed, or it may be due to an omission in the lookup table used by Template:GetAdjectiveFromCountryName. (Some former countries may have been omitted. Also, when country has been renamed, the lookup uses only the current country name).

If a lookup fails, then the template creates no output other than an error message. If you are satisfied that the category is correctly named, use the one of the optional parameters below.

Optional parameters

 * Fooish bypasses the lookup of the nationality, and uses "Fooish"
 * AnotherCountry is available for use when a country is part of another country.
 * yes turns on diagnostics, which may help if the template doesn't work as expected

Tracking
Use of the parentnationality parameter is tracked in:
 * Category:Template YYY0s in nationality cinema category header with parentnationality (population )

Categories where country lookup fails are tracked in a category shared with many other templates:
 * Category:Errors reported by other category header templates (population )