Miller used the play as a criticism of McCarthyism. The Crucible is about the witch-hunt, plus trials that took place in Salem in 1692. In this play people cared about other people's business and being accused of witchcraft was the most dangerous sin. To avoid being hanged people accused others... so yeah
Language helps us communicate with each other in spoken and written form.Without that we wouldn't be able to properly express ourselves to eachother.
Language is very important to culture and to your home country without it you won't be able to have a true connection with your people or your culture.