jQuery validate plugin: accept only German letters

Question

I am looking for a method for the jquery validate plugin (http://bassistance.de/jquery-plugins/jquery-plugin-validation/), that only accepts letters, including the German so

Answer 1

[a-zA-Z\u0196\u0228\u0214\u0246\u0220\u0252\u0223]

These are the unicode characters for german letters, including the normal letters.

And this is normal :

[a-zA-ZüöäÜÖÄß]

It depends on what your input is.

The above matches single letters. Since you provide no sample input we can't make the regex rule more specific!