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When tweeters use hashtags, they tend to be more formal and drop the use of abbreviations and emoticons. But when they use the @ symbol to address smaller audiences, they’re more likely to use non-standard words such as ‘nah,’ ‘cuz’ and ‘smh.’ When they tweet to others in the same city, they’re more likely to use unique words specific to that area, a new study shows.
http://www.sciencedaily.com/releases/2015/09/150909124834.htm