en el = in/on the
Assuming that you are speaking spanish, "en el sur" would directly translate as "in the south".
The Spanish in the world
Queda en el museo means: (in Spanish) Is in the museum.
In Spanish it means 'At bar'
On the floor/In the background
In the work plan
"Love is in the air my affection."
Para el (sustantivo masculino en singular) --- For the (masc. noun, singular)
Estoy en el 10 º grado or estoy en el décimo grado mean the same
"Hay palabras en el libro" means "There are words in the book" in Spanish.
It means "My birthday is in the month of".
"Y no creo en el amor" means "And I don't believe in love" in Spanish.