In reply to:

Latin in music

Yes and no, Wow. It's not Latin which is used in music, it's Italian (they were the first to invent a more-or-less standard set of directions which had more-or-less precise meanings) and the Italian directions have never been universal. German composers will say breit instead of largo and French composers (naturally) usually write their directions in French. It's mostly English and Americans who have preserved the Italian system, even translating directions in German, in an edition of Bach, for instance, into Italian. But that's dying out. More and more, composers are using, and publishers printing, directions in the composers language. (except in the case of composers like Sibelius, since nobody reads Finnish).