The basic German alphabet is similar to the English alphabet for most of its characters. There are some special characters in the German alphabet that are not printed on the international keyboard. We can use the alt code system to write special characters as follows. Uppercase Umlaut Ä. Uppercase Umlaut Ö. Uppercase Umlaut Ü. Eszett (ss) ß, Großes Eszett ẞ, Lowercase Umlaut ä. Lowercase Umlaut ö, Lowercase Umlaut ü.
These special symbols are used to indicate the vowel letters in German language ( ä, ö, ü ) they are also called umlaut. In the past, the Germans used to put ( e ) after vowels, after developing a new generation of printers, it was replaced by current symbols that are placed above the vowel.