The Language Atlas adapts and combines the following sources.
Glottolog 5.3, by Hammarström, Forkel, Haspelmath & Bank, and WALS Online, edited by Dryer & Haspelmath, are used under CC BY 4.0.
PHOIBLE 2.0, edited by Moran & McCloy, is used under CC BY-SA 3.0.
Country language coverage incorporates Unicode CLDR 48, © Unicode, Inc., under the Unicode License v3.
Map borders use Natural Earth data, which is in the public domain.
Speaker figures use the 2026 L1 + L2 table; broad Arabic is presented as one profile.