We use Open DNS + Norton DNS to detect if a website is porn / phishing website.

However we found a lot of non-English websites that can not be detected from Open/Norton DNS. Those are mostly Thai sites.

Later we also found Securly.com, but it misses lot more sites than Open/Norton DNS.

We found some more DNS lists, but they block just phishing, but not porn.

Later we found three different downloadable block lists, but they miss lot sites and are actually similar to what Securly have.

We also tried some lame-filters that finds specific words, but results are not very good and we miss-detect some non-porn websites.

Any ideas? :)