The Object Editor Fields, GUI Categories, variabletype names change with a different localization. This also includes the order in which they are placed, not only the displayed text. Different order makes it ineffective for anyone that already did a lot in the non english version.
In the same time it is unclear if the editor support for non english version was dropped or this is just a bug. Haven’t read anything offical about that, therefore relearning it is also shady.
The German Forum has no fitting category for such posts it only has: announcement/news and technical support.