网络论坛语言是高度口语化的语言，能够真实反映香港网民的语言使用面貌；超语实践的理论视角则有利于管窥香港人的多语语言生活，有效展示并深入分析其文化身份的建构。对香港网络论坛上的语言进行分类解析，发现香港网民的超语实践具有以下特点：（1）多码混用，表现为粤英混杂、多语借用、符号混用；（2）多元创新，表现为利用音译和谐音创造新词语、加合构词、词类活用与旧词新解；（3）网络潮语具有明显的社区特征。基于此，将香港网民文化身份特征归纳为多元混杂性、本土主体性、变动性和“拿来主义”创新性。其中，变动性集中体现为回归以来香港人国家认同的建构，以及对中国人身份、国家发展与粤港澳大湾区一体化认知的深化。超语实践不仅是香港人主动构建文化身份的符号表征，反过来又增强了香港人对自身文化身份的边界认知、身份归属、情感黏着与持续创新；既使香港文化的多元性在语言层面得以具象化，也深刻反映了香港文化的韧性和创造力。

The language used in online forums of Hong Kong is highly colloquial and provides an authentic representation of language use among Hong Kong netizens. Meanwhile, the theoretical perspective of translanguaging offers valuable insights into their multilingual lives, enabling an effective exploration and in-depth analysis of the construction of Hong Kong netizens’ cultural identity. Through classification and analysis of the language use in Hong Kong online forums, this study identifies the following characteristics of Hong Kong netizens’ translanguaging practices: (1) multicode integration, as reflected in Cantonese–English mixing, multilingual borrowing, and the use of mixed semiotic resources; (2) diverse linguistic innovation, manifested in the creation of new words through transliteration and homophony, compound formation, functional shifts of word classes, and new interpretations of existing words; (3) strong community specificity in online buzzwords. Based on these, the cultural identity of Hong Kong netizens can be characterised by hybridity, local subjectivity, fluidity, and innovative selective appropriation. In particular, its fluidity reflects their construction of national identification after Hong Kong’s return and deepening recognition of their identity as Chinese, national development and the integrated development of the Guangdong-Hong Kong-Macao Greater Bay Area. Translanguaging serves as symbolic representations through which Hong Kongers actively construct their cultural identity. In turn, it also reinforces Hong Kongers’ awareness of identity boundaries, sense of cultural belonging, emotional attachment, and capacity for continuous innovation. Such translanguaging practices concretise Hong Kong’s cultural diversity through language, while demonstrating the resilience and creativity embedded in Hong Kong culture.