For the Word Nerds, from Dr. Thursday

What are the "control" words - the words of command - by which one
tells
a HORSE what to do?

From "general knowledge" one usually comes to know that
Giddyap means "get moving" (= get thee up)
and
Whoa means "stop"
but are there others, like, turn left, or right, or backup, etc???

If this seems too easy - what are these words in other languages? (In
particular I would be curious about their Latin and Greek equivalents.)