No, it shouldn't be capitalized.
No it shouldn't be capitalized.
no
No, but the names of individual languages are capitalized.
no
It should only be capitalized if it forms part of a title.
Yes... indeed it is!
No, it is a common noun.
No it is a common noun.
The word "not" is typically not capitalized in a title unless it is the first word, a proper noun, or part of a hyphenated word.
No, but it is just one word: saltpeter.
No, except if the word is used at the beginning of a sentence.
Earth, as in we live on the planet Earth, is supposed to be capitalized. Earth, as in the dirt we walk on, is not supposed to be capitalized.