The same most western nations use: the Latin Alphabet (A B C D...)
The language of Australia for business and government is English. It is written with the English alphabet.
The Mexican alphabet. The Greek use the Greek alphabet. The Germans use the German alphabet. The French use the French alphabet. Etc.
The Spanish version of the Latin alphabet (same as Mexico and Spain).
The Spanish version of the Latin alphabet (same as Mexico and Spain).
They use the Portuguese version of the Latin alphabet
They use the Italian version of the Latin alphabet
Spain uses the Latin Alphabet.
They do not use an alphabet in China. They use a system of thousands of logograms (symbols for words).
Latin
The Greek alphabet, an evolution of the Phoenician. An evolution of the Greek alphabet was the Latin.
same as English
the Latin alphabet