The document discusses learning customers' language by understanding their problems, asking questions, and listening to their stories. It recommends asking questions like "What problem are we trying to solve?" and "Why are we doing that right now?". It also suggests using personas, task matrices, mockups, and customer stories to understand needs from the customer perspective in a format of "As a [role] I need to [action] so that [happy result]". Behavior driven development and executable specifications are presented as ways to capture stories and test acceptance. Resources on SpecFlow, StoryQ and examples of personas are provided.