For me, expertise in a second language nowadays is very important to get a better job, meet cool people or other sorts of things. However, it depends on the person´s needs, for example if it´s a person who travels a lot around different countries, it might be useful to have an elementary level in various languages as well as be expert in 1 or 2. After all, a foreign language is a code another culture uses to communicate and that´s fascinating.