Yes, the S of Spanish should be capitalized, and not just when you are referring to the language. If for instance, you write the words "Spanish culture," or "Spanish rice," or "Spanish people," the S should also be capitalized in those cases.
(but in Spanish, the first letter of a language is not capitalized; i.e. ingles, not Ingles.)
Always as it is the name of the language. It is a proper noun, which you must always capitalize.
When referring to the fish, it shouldn't be capitalized.
It should be capitalized if you are referring to a specific metro system.
Capitalize the "c" in the word congress when you're referring specifically to the United States Congress or the title of another specific congress.
Yes, you do capitalize the word department when it directly follows the name of that department. This is the case when signing letters or referring to specific departments in emails or in writing.
Yes, you should capitalize "French" when referring to a French language class as it is a proper noun.
Always as it is the name of the language. It is a proper noun, which you must always capitalize.
Yes, you should capitalize the word "Figure" when referring to a figure in a paper.
It is not necessary to capitalize the word "yo".
Yes, you capitalize the word "Chapter" when referring to a specific section in a book.
"Tay" isn't a Spanish word. Perhaps you were referring to the abbreviation "TAY," which means Thinking About You.
Yes.
When referring to the fish, it shouldn't be capitalized.
First of all, 'CPA' is not a word. If you're referring to 'Certified Public Accountant', then yes, you would capitalize 'CPA'.
Some words borrowed into Spanish are: Flashback internet waffle weekend western (referring to cowboy movies) whisky
Only if you are referring to God.
Yes, Spanish is a proper noun, a word for the language of Spain or the people of Spain; the name of a specific language or specific people. A proper noun is always capitalized.The word 'Spanish' is also a proper adjective, a word that describes a noun as of or from Spain. A proper adjective is always capitalized.