It may that they did not add it for a reason also. There are a lot of edge cases because many potentially dirty concepts are made up of words that are not bad alone. For example a text can have both &quot;girls&quot; and &quot;nude&quot; in it without being vulgar, but if it has the phrase &quot;nude girls&quot; the chance for it being pornografic is much higher.<p>( Searchdaimon have done some research on this and have a list if anyone is intrested: <a href="https:&#x2F;&#x2F;github.com&#x2F;searchdaimon&#x2F;adult-words" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;searchdaimon&#x2F;adult-words</a> )