Bug with Language setting

Hello,

in one of the latest updates a new bug appeared:

When setting language to “Deutsch / German”, after saving the language is set correctly, but the active option in the drop down is set to “English”. Therefore you have always to re-set language to “Deutsch / German” again, before saving settings again, when you still want to have german texts in the plugin backend.

At other languages (tested with Espanol and Polski) it works correctly: After saving the settings the active option in the language dropdown was the saved setting.