Milos Rancic, 20/05/2015 10:36:
May somebody clarify that Unicode data is free? PD or CC-BY-SA compatible.
Sure. The license __for data and software__ is http://unicode.org/copyright.html#Exhibit1 which is a BSD 3-clause license with trivial changes to make it even clearer and freer, such as the removal of the term "binary form" and "other materials".
CLDR data is embedded in most free software, e.g. via ICU, packages for which are available e.g. in Debian which is notoriously restrictive as regards licenses. https://packages.debian.org/search?keywords=icu
Besides, language names are evidently not copyrightable and Unicode makes no attempt to state the contrary. (Their license is still useful for sad places like EU where the set of names could be considered subject to sui generis database rights.)
Nemo