16. The non-transitory computer-readable storage medium of claim 12 , wherein the operations further comprise: receiving an identification of a common language; and translating any of the posts of the least two groups of posts which are not in the common language to be in the common language.
12. A non-transitory computer-readable storage medium storing instructions configured to, when executed by a computing system, cause the computing system to perform operations for identifying comparatively trending topics, the operations comprising: receiving, as post parameters, one or more parameters that distinguish social media postings; obtaining, over a network and based on the received post parameters, at least two groups of posts; generating, for each selected group of posts of the at least two groups of posts, a corresponding ranked list of topics by: identifying topics from the selected group of posts wherein each identified topic comprises one or more words; and computing a rank score for each of the identified topics; associating, with an individual topic from a selected one of the corresponding ranked lists, a difference score computed as a difference between: the rank score for the individual topic from the selected one of the corresponding ranked lists, and a rank score for the individual topic computed from one or more of the ranked lists other than the selected one of the corresponding ranked lists; comparing the difference score to a specified threshold; in response to determining that the difference score is above the specified threshold, identifying the individual topic as a comparatively trending topic.