An illustration is a visual explanation of a text or a concept which is published in a book or media. A chart is a sheet of information which is presented in the form of a graph, table, or a diagram. A diagram is a drawing is when information are presented using visuals.
A map shows the whole world in visuals on a smaller scale. Maps shows us about the various planets and countries that we have which are presented as visuals.
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.