<span>There are only two verbs in the sentence 'went' and 'is' so it must be 'is'. However the word 'which' acts as a conjunction which thus links the two things together. Without the 'We went' bit it would be 'Santa Fe is the second oldest city in the US.'</span>
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.
