Which service allows you to perform sentiment analysis on comments from a website?

The Language service in Azure provides the capability to perform sentiment analysis, making it the correct choice for analyzing comments on a website. Sentiment analysis involves determining the emotional tone behind a series of words, which can help identify whether the comments are positive, negative, or neutral. This service uses natural language processing (NLP) techniques to evaluate the context and nuances of the text.

The other services mentioned serve different functions and are not designed specifically for sentiment analysis. The Speech service focuses on converting spoken language into text or converting text into spoken language. The Translator service is aimed at translating text from one language to another, which does not include analyzing the sentiment of the content. The Cognitive Services container provides a broader implementation of various cognitive services, but it would still need to include the Language service for performing sentiment analysis specifically.