Legumes Translated supports innovation in grain legume-supported cropping systems and value-chains by linking sources and users of quality-assured knowledge using rigorous knowledge synthesis and compilation. Knowledge is compiled at two levels: at the level of Actor Groups’ specific farming system and value chain activities, and in seven technical areas of agricultural sector and value-chain transition (Transition Networks). The project addresses an urgent need and cross-sector challenges by building on technical opportunities. The urgent need is due to the imbalance in cropping systems now dominated by cereal crops with adverse agronomic and environmental effects. The cross-sector challenge arises from the growing demand for alternative sources of plant protein, growing consumer interest in the environmental impact and resource efficiency of value chains, growing demand for GMO-free value chains and grain legume-based foods. The technical opportunity arises from the range of innovation groups in Europe that are now translating relevant knowledge at a local and regional level. Our consortium comprises an existing innovation community represented by 15 Actor Groups with research-based knowledge, value-chain actors’ knowledge and insights from the pre-farm side of the value chain right through to retailing, including the supporting and regulating functions such as policy development. The project uses a co-learning framework to validate the knowledge compiled within Actor Groups and between Actor Groups within the seven Transition Networks. In addition to direct interaction between partners, an extensive range of primary communications provided in an internet-based knowledge platform (The Legume Hub) will have a lasting character documenting the work. Secondary communications will target specific groups along value chains using a wide range of media. The project includes work for impact beyond the project time-frame.