Which feature of Azure Cognitive Services focuses on understanding and processing human language?

Language Understanding (LUIS) is the feature of Azure Cognitive Services specifically designed to comprehend and process human language. It allows developers to build natural language interfaces for applications by interpreting user intents and extracting relevant information from utterances.

LUIS uses machine learning to identify the intent behind verbal or written statements and extract key entities, enabling more intuitive interactions with applications. This capability makes it particularly useful for creating chatbots, virtual assistants, and applications where understanding user intent is crucial.

While Text Analytics also deals with language by providing insights like sentiment analysis and key phrase extraction, it doesn't focus on language understanding in the same interactive manner as LUIS. The Speech Service is centered around converting speech to text and vice versa, and the Face API is focused on facial recognition. Hence, LUIS stands out as the primary tool for understanding and processing human language within the Azure Cognitive Services suite.