Learn English – Which form should be used for nationality: German or Germany

For a form, the title of a section containing multiple questions will generally have this format:

→ Questions

→ Questions concerning/about [noun phrase]
_{e.g. Questions concerning duration of residence}

→ [noun phrase] questions
_{e.g. Homeownership questions}

In a book or academic paper, you might use a determiner and/or an adjective:

→ Some questions concerning/about [noun phrase]
_{e.g. Some questions about the status of pronouns}

→ A few more difficult questions

This would be seen as somewhat more conversational and prosaic, rather than official and formulaic.

Note that a playful website might also have something along those more conversational lines:

→ A few quick questions about your background

To say that someone is

German born
nationality born

means they are German and born in Germany, in your example

German born American

means Charles was born in Germany but has US citizenship, he may or may not have American parents. Or similarly

American born Chinese

means one is of Chinese ethnicity, but born in America, which by birth right makes them American.

You would not say

Germany born

but rather

born in Germany
born in country