Yes.
"Bruder," and it is always capitalized because it is a noun.
German is an adjective. It's a proper adjective, which means that it is always capitalized.
Formal: Sie (always capitalized) Informal: du Plural: ihr
The German word Woche (always capitalized) means week in English.
The German word "Tag" is capitalized when it starts a sentence or if it is a noun, but it is not typically capitalized when used in the middle of a sentence as a normal word.
"Ozean," always capitalized because it is a noun and pronounced "oh-tsay-ahn."
It's German Shepherd, both the G and the S are capitalized.
Yes. You should always capitalize proper nouns. German Empire is a proper noun because it names a specific place.
Yes, "I am" is typically capitalized because "I" is a pronoun and should always be capitalized in English.
Other than the fact that it should be capitalized (in German all nouns are capitalized), yes.
This one's simple: "Hotel," always capitalized because it's a noun and pronounced like the English "hotel."
Yes, when referring to the title of the President of the United States, it should always be capitalized.