Abstract—With the rapid growth of Internet technologies and applications, Text is still the most common Internet medium. Examples of this include social networking applications and web applications are also mostly text based. We developed a framework to determine an anonymous author’s native language for short length, multi-genre such as the ones found in many Internet applications. In this framework, four types of feature sets (lexical, syntactic, structural, and content-specific features) are extracted and three machine learning algorithms (C4.5 decision tree, support vector machine and Naïve Bayes) are designed for author’s native language identification based on the proposed features. To experiment this framework, we used English, Persian, Turkish and German online news texts. The experimental results showed that the proposed approach was able to identify author’s native language in web-based texts with satisfactory accuracy of 70% to 80%. And Support vector machines outperformed the other two classification techniques in our experiments.