The Wolfram Language includes a wide range of pre-trained classifiers that can be applied to text, images and more.

Classify — classify data into categories using a built-in classifier

ClassifierFunction — symbolic representation of a classifier to be applied to data

Text Classifiers

"FacebookTopic" — which topic a Facebook post is about

"Language" — which natural language text is in

"LanguageExtended" — language of a text, including rare languages

"NameGender" — which gender a first name is

"Profanity" — whether text contains profanity

"ProgrammingLanguage" — which programming language text is in

"Sentiment" — sentiment of a social media post

"Spam" — whether email is spam

Image Classifiers

"CountryFlag" — which country a flag image is for

"FacialAge" — estimated age from a face

"FacialExpression" — what type of expression a face displays

"FacialGender" — what gender a face appears to be

"NotablePerson" — what notable person an image is of

"NSFWImage" — whether an image is considered "not safe for work"