AI-mediated communication refers to communicative processes in which artificial intelligence systems actively generate, interpret, modify, or facilitate language. With the rapid advancement of language technologies such as large language models, conversational agents, speech recognition systems and machine translation tools, AI has evolved from a supportive tool into an active mediator of human communication. This paper conceptualizes AI-mediated communication as a form of language technology that reshapes traditional models of interaction, meaning-making and authorship. The study examines the technological foundations of AI-driven language processing and their broader socio-cultural, pedagogical and ethical implications. It explores how AI mediation influences linguistic norms, accessibility and power relations, while also raising critical concerns related to bias, surveillance and linguistic homogenization. By situating AI-mediated communication within contemporary digital culture, the paper argues that understanding AI as a language technology is essential for critically engaging with evolving communicative practices and for developing responsible, inclusive and ethically grounded AI-driven communication systems.