پرونده:Indo-European branches map.png

The distribution is essentially and approximately based on the map "Indo-European languages – Approximate locations of Indo-European languages in contemporary Eurasia" from Britannica.com, although with the following minor modifications:

The two articles "Balto-Slavic languages" and "Indo-Iranian languages" from Britannica.com stress the lack of scholarly consensus on these branches. That is, for the former, whether Baltic and Slavic developed from a common ancestral language, or that the similarities are the result of parallel development and of mutual influence during a long period of contact. To cater for both scholarly viewpoints, this map shows Baltic and Slavic with two distinct shades of green under "Balto-Slavic". For the latter, the dispute is whether the Indo-Iranian languages include just the Iranian and Indo-Aryan (or, Indic) language groups, or Nūristānī and Bangani too. To prevent disagreement (and also because this map only represents the primary branches of Indo-European), all of Indo-Iranian is represented with one shade.

The article "Romance languages" from Britannica.com states that the Romance languages form "a subgroup of the Italic branch of the Indo-European language family".