Altaic languages
However, linguists agree today that typological resemblances between Japanese, Korean and Altaic languages cannot be used to prove genetic relatedness of languages, as these features are typologically connected and easily borrowed from one language to the other (e.g. due to geographical proximity with Manchuria). Such factors of typological divergence as Middle Mongolian's exhibition of gender agreement can be used to argue that a genetic relationship with Altaic is unlikely.