Yes, FontCreator was the first font-editor to make Colour Fonts. The latest version is now 11.5.
See also my tutorial on Making Coloured Glyphs.
There is no German version. FontCreator is maintained by a single developer from the Netherlands. Supporting other languages has been requested before: German Program Language.
Although it might be fairly easy to provide a multi-lingual interface, it would take too much work to translate and update all help files, the web site, etc., and to provide proper support. Those who purchased versions in other languages would feel that they are second-class customers.