This proposal answers EC invitation (Objective 4.1 d) to provide the "foundations of a scalable platform for the joint development/enhancement and hosting of (multi-) language data sets, processing tools and basic services... The aim is to create over time a comprehensive online repository...underpinning research, technology transfer and industrial development efforts." Language Technology (LT) researchers, vendors and service providers have repeatedly stressed the strategic value of common platforms for their respective work. Broad-based initiatives such as META-NET (mostly research and technology centres) and LT-INNOVATE (LT commercial players) have all highlighted the crucial importance of an open, extensible infrastructure to support research, facilitate sharing and reuse of research results, act as an aggregation point for commercial technology developers and solution vendors, driving down innovation costs and promoting the EU LT ecosystem to higher levels of competitiveness. This Support Action will deliver the strategic vision and operational specifications needed for building the MLi (European MultiLingual data & services Infrastructure), formulate a multiannual plan for its development and deployment, and shape the multi-stakeholders alliances ensuring its long term sustainability. The consortium will deliver: a) the functional, technical and operational Specifications of the MLi, b) a multiannual roll-out Plan of the MLi and its constituent services, with stages of development and cost/effort estimates, c) a sustainable Governance model, as well as terms and conditions for an organisation tasked with the administration, operation and maintenance of the MLi, and d) the statements of Commitment of stakeholders, to actively support deployment of the MLi. Project outputs will be fed into new EU programmes, most notably Horizon 2020 and Connecting Europe Facility, and will be offered as inputs to calls for tenders/proposals the EC will launch in due time.