Why are idioms important

in every single culture there are colloquialisms and a specific way to talk depending on the context. When you are learning a new language it is really hard that your teachers go out of the textbook and start teaching how how to talk on the street; If you go to your classroom you will easily start a conversation even doing excellent sentences, but if you go out to a coffee shop where is spoken that language that you are learning you will probably understand just a few things, that's why idioms are important because with them you could speak with native speakers without feeling confused and you also have to make a difference between formal writing and the use of these idioms or slangs, those are really important in our process of learning and the sociolinguistic teaching. Here I leave some Idioms for you: *A chip on your shoulder: it is usted to say that you are holding a grudge with someone. In Spanish we could say "una espinita con alguien"
*IRub someone the wrong way: it is used to way that you are bothering someone. In Spanish could be said as "Me la tiene montada"
*IPay the piper: it means you need to face the consequences of your actions. In Spanish could be "a lo hecho pecho."
*IOnce in a blue moon: when something happens rarely, because a blue moon is two full moons in one month and that doesn't happen often. In Spanish could be said as "cada año por la cuaresma"
*IRaining cats and dogs: it is used to say that is raining in large amounts. In Spanish could be said as "están lloviendo maridos".