Abstract
<jats:p>The terms vinho nobre (Portuguese), vino noble (Spanish), and vino nobile (Italian) illustrate how cognate vocabulary can encode different regulatory meanings in the wine sector. Brazilian vinho nobre is a technical classification tied to alcohol strength and the exclusive use of Vitis vinifera (14.1%–16%ABV) under law Instrução Normativa No. 14/2018. Spanish vino noble denotes an aging-based category requiring at least 18 months of maturation under Spain’s traditional aging terminology framework. Italian Vino nobile di Montepulciano is a protected territorial denomination (DOCG) with minimum Sangiovese content and mandatory aging requirements. This paper compares these three frameworks as distinct quality signals, examines the institutional and historical roots of divergence, and analyzes legal and trade implications under TRIPS and the EU–Mercosur agreement. It documents a triangular asymmetry—technical standard (Brazil), aging category (Spain), territorial GI (Italy)—and propose policy measures (terminology equivalence annexes, labeling differentiation, and international terminology standards) to reduce consumer confusion and trade friction.</jats:p>