It's weird to think that today, multilingual speakers might outnumber those who only speak one language.
I don't find that weird at all. Outside of the United States, it's actually quite common for someone to speak two or more languages.
Multilingualism
Multilingualism is the use of more than one language, either by an individual speaker or by a group of speakers. It is believed that multilingual speakers outnumber monolingual speakers in the world's population. More than half of all Europeans claim to speak at least one language other than their mother tongue; but many read and write in one language. Always useful to traders, multilingualism is advantageous for people wanting to participate in globalization and cultural openness. Owing to the ease of access to information facilitated by the Internet, individuals
and of an entity in which a single language is either used or officially recognized (in particular when being compared with bilingual or multilingual entities or in the presence of individuals speaking different languages). Note that mono"glottism" can only refer to lacking the "ability" to speak several languages. Multilingual speakers outnumber monolingual speakers in the world's population.
Suzzane Romaine pointed out, in her 1995 book "Bilingualism", that it would be weird to find a book titled "Monolingualism". This statement reflects the traditional assumption