Help:Extension:UniversalLanguageSelector/Input methods/de-transliteration

This input method allows you to enter special characters used in the German language if they are not available on your keyboard.

What you type What you get
~a ä
~A Ä
~o ö
~O Ö
~u ü
~U Ü
~s ß
~S ß

Issue edit

Sadly it doesn't work on a Samsung XE500C21 Chromebook (ChromeOS).