How to match the international alphabet (English a-z, + non English) with a regular expression?

Question

I want to allow only entered data from the English alphabet and from the alphabet from Germany.

Like öäü OR France like áê or Chinese like

Answer 1

Since you specifically ask for Unicode, \p{L} is the shortcut for a Unicode letter. Not all regex flavors support this syntax, though. .NET, Perl, Java and the JGSoft regex engine will, Python won't, for example.

So, for example \b\p{L}+\b will match an entire word of Unicode characters.