For a long time, the software engineering community has struggled with getting end users more directly involved in the development of (business) software in order to avoid the infamous Word Requirements Document which is subsequently misunderstood by developers and then implemented wrongly. Recently we have made good progress towards this goal by using domain-specific languages that blur the distinction between prose, traditional code, math formulae, tables, diagrams and form-based applications. In this talk I’ll show examples of languages we have built, explain how we built them, and explore some of the lessons we have learned along the way.