Language engineering is a research field and methodological approach concerned with the systematic design, development, and deployment of computational systems that process, understand, or generate human language. It investigates the principles and techniques required to engineer robust, efficient, and scalable language technologies, integrating linguistic knowledge with computer science methodologies. Key characteristics include its focus on practical applications, the application of engineering principles to language data and processing, and the goal of building reliable language-aware systems. Its significance lies in enabling the creation of practical applications such as machine translation, information extraction, speech recognition, and dialogue systems, facilitating automated language processing and human-computer interaction.