A language border or language boundary is the line separating two language areas. The term is generally meant to imply a lack of mutual intelligibility between the two languages.

Five languages have more than 50 million native speakers in Europe: Russian, German, French, Italian, and English. Russian is the most-spoken native language in Europe, [4] and English has the largest number of speakers in total, including some 200 million speakers of English as a second or foreign language. (See English language in Europe.)

The following map shows the language families of Europe (distinguished by colour) and languages within those families. Note that the terms “language” and “dialect” are not mutually exclusive, and some of the languages shown in the map may be considered dialects of others.

Map showing native languages of Europe. Striped areas indicate several mother tongues in the region. For example, Brussels is a majority-French city, shown striped French and Dutch because of the Dutch minority residing there. All political borders shown are de jure. In areas where data was difficult to gather estimates have been made. Source ...