How can I block a massive number of URLs on Windows XP, without modifying the hosts file?

How can I block a massive number of URLs on Windows XP, without modifying the hosts file?

My GF is from a country X. She is now living abroad but is addicted to internet and often spends many hours per day on her laptop browsing "nonsense" information by websites from that country X, or written in a language used by people from that country X.