The rapid proliferation of social media over the last ten years has revolutionized the way that brands and consumers connect, communicate, and interact with each other. Nowadays, approaching creative brand posts in a way that maximizes consumer engagement has become a growing challenge to social media marketers. This thesis addresses this challenge and aims to understand how to enhance consumer engagement with brand posts on social media through the lens of linguistics. To achieve this goal, three independent but related papers were conducted to 1) investigate how the linguistic styles of brand social media posts influence consumer engagement; 2) examine the interactive impacts of consumer comment valence and brand response language style on consumers' evaluation of brand and their intention for future engagement with the brand; and 3) explore whether and how incorporating emojis in brand social media posts affects consumer engagement with the posts. The findings of this thesis indicate that, for brands, using proper language when communicating with consumers on social media can improve consumers' perceptions of brands and enhance their engagement with brands. The results of this thesis deepen our understanding of the role that brand language plays in influencing consumer engagement on social media as well as provide many practical guidelines for social media marketers regarding the language they use in communicating with consumers on social media.