1. A system comprising: a machine-readable memory storing computer-executable instructions; and at least one hardware processor in communication with the machine-readable memory that, when the computer-executable instructions are executed, is configured to: obtain primary language content written in a first spoken language; obtain secondary language content written in a second spoken language; obtain a machine translation of the primary language content by machine translating the primary language content from the first spoken language to the second spoken language; determine an initial language model, based on the second spoken language, from the machine translation of the primary language content; determine a language model perturbation using the initial language model, the language model perturbation accounting for a difference between the machine translation of the primary language content and the secondary language content; determine a classification model from the initial language model and the language model perturbation, the classification model being used to classify a given plurality of words written in the second spoken language to identify whether the given plurality of words written in the second spoken language are irrelevant to an item of interest provided by a social media networking site in the first spoken language; apply the classification model to a plurality of comments received in a written form of the second spoken language and associated with the item of interest; determine, by using the classification model, that at least one comment selected from the plurality of comments is irrelevant to the item of interest; and prevent display of the at least one comment in response to classifying the at least one comment as irrelevant, wherein: the selected at least one comment was provided by a first member of the social networking service, and the selected at least one comment is prevented from being displayed to other members of the social networking service that request a display of the item of interest.