Emmanuel you are right that a normal user is not affected because he sets his language once.
Developers, translators and those who change the language for screenshots for help in the forum are affected. As enkonyito wrote it would avoid to exit SH3D each time we change the language.
BTW: Multiple instances will not help. Changing the language in one instance will also change in the other instance (only tested with Linux).
In the category view the German texts of the standard libraries will also not be removed when changing to English. With imported libraries this will happen.
German:
After changing to English:
