diff --git a/api/sixtyfps-cpp/docs/language.rst b/api/sixtyfps-cpp/docs/language.rst
index 2d4065725..ef17fa286 100644
--- a/api/sixtyfps-cpp/docs/language.rst
+++ b/api/sixtyfps-cpp/docs/language.rst
@@ -1,3 +1,13 @@
+.. LICENSE BEGIN
+..    This file is part of the SixtyFPS Project -- https://sixtyfps.io
+..    Copyright (c) 2020 Olivier Goffart <olivier.goffart@sixtyfps.io>
+..    Copyright (c) 2020 Simon Hausmann <simon.hausmann@sixtyfps.io>
+..
+..    SPDX-License-Identifier: GPL-3.0-only
+..    This file is also available under commercial licensing terms.
+..    Please contact info@sixtyfps.io for more information.
+.. LICENSE END
+
 The .60 UI Design Language
 ==========================