Within their respective countries, Catalonia and Quebec share many characteristics. Both have exercised their political, economic and linguistic powers to advance language planning and terminology planning in their region. Moreover, Catalan and Quebecois societies both have a language that is in the minority relative to the country to which they belong – a fact that, over time, has led to the implementation of multiple means of preserving and revitalizing these languages. This article outlines the numerous exchanges between Quebec and Catalonia since the mid-1970s, a key period in the linguistic assertion of both nations. Various aspects of the contribution Quebec has made to Catalonia are discussed with respect to language planning in particular. These exchanges inspired Catalans in the creation of their policy on education and terminology standardization: for example, the Office québécois de la langue française (i.e. the Quebec board of the French language) has, for the last 25 years, found its Catalan counterpart in Termcat. Furthermore, beyond the underlying ideas, the article describes the concrete manifestations of Catalan-Quebecois sharing. The exchanges between Quebec and Catalonia are then summarized, notably so that the overall impact that Quebec has had within the discipline can be determined. The conclusion emphasizes that, for many years, Catalonia has exerted a strong influence on the field of terminology: it has itself become an important hub for disseminating terminological information to other communities and thus now constitutes a source of inspiration for Quebec.