How to write a regular expression for multilingual text?

Question

Programming

I can't find a solution at all.
Let's imagine that I have a multilingual site. And users have the right to enter their first and last name in their own language when registering. And how many languages, so many alphabets...
The conditions for a regular expression in words are: text characters, spaces and a hyphen.
How to implement in practice??
Isn't it possible for each language to write its own regular expression listing all characters in Unicode? And if this is the only way out - maybe there are already some libraries specifically for this, in which hardworking people have already hammered alphabets?
(I'm interested in PHP implementation)

Answer 1

Have a look at XRegExp . One of his plugins understands unicode letters.
For PHP, they write here that preg_match with the /u parameter does a similar job

Answer 2

In such a situation, do the opposite.
Do not check for a range of required characters, but check for prohibited characters.