search an array in mysql

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hello guys,

I've got a problem: How can I search for a string in an mysql-array?
For example: I want to select every 'lang' where 'names' = 'Paul'.
I know, it can be done by using WHERE names LIKE %Paul%, but I've read that this method has got a slow performance. Is there any way, to do it faster, beacause my database is very heavy.

id | lang | names
1 | UK | Paul;Armin;Joe;Sally
2 | DE | Georg;Amy;Paul;Don

Thanks!
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