What does 2 dots over a letter mean?
umlaut Considering this, What letters can have an umlaut? As well as the twenty-six letters of the alphabet, the German language is also characterised by the umlaut, a diacritic in the form of two dots which can be placed over the letters ‘a’, ‘o’ and ‘u’ to form ‘ä’, ‘ö’ and ‘ü’.