There's no reason not to use Perl to create a search engine, other than the fact it's been done before... but you've answered that already: not in Serbian.

Perl definately gives you access to many of the tools you would need: LWP::RobotUA, WWW::Mechanize, HTML parsers, XML parsers, DBI, and so on.

Of course you'll also need a good database. PostgreSQL or something like that comes to mind. And a big hard drive. ;) The suite would have to consist of various types of crawlers, and then another script to handle the queries against the database.