Mass in reference to a church service should always be capitalized because it is a proper noun. The Mass has the same construct wherever it is performed which makes it a unique entity similar perhaps to a play such as Les Miserables which would also be capitalized.
When mass is used in the lower case it is meant as a reference to a quantity, often a large quantity.
Since 'spirit' is a common noun, the only time where you can capitalize it would be if it is at the start of a sentence or part of a title.
The word Copyright should always be capitalized. It is a specific name for a specific thing.
Yes, Italian is always capitalized.
no
No it should only be capitalized if it forms part of a title.
mayb
Yes, Sunday should always be capitalized.
The word Copyright should always be capitalized. It is a specific name for a specific thing.
No, the word "rif" is not always capitalized. It should only be capitalized if it is part of a proper noun or at the beginning of a sentence.
Indian should always be capitalized.
Yes, Italian is always capitalized.
Yes, the word "Americans" should be capitalized as it is a proper noun referring to the people of the United States of America.
no
No it should only be capitalized if it forms part of a title.
mayb
Yes, "Japanese" should be capitalized when referring to the nationality or language (e.g., Japanese culture, Japanese cuisine).
If it is the first word in the sentence then it should be capitalized or if it is in a title but other than that it is always lower case.
Yes, it is always capitalized because it is a propernou n.