The article traces the spread of Spanish across the globe, highlighting the changing nature of this spread, from indicator of local dominance to colonisation, and then, today, globalisation. This article focuses on the role of Spanish in an era of globalisation, raising issues about the nature of a world or global language, and noting how the emergence of such languages mirrors the decrease of a wider linguistic diversity. It seeks to answer such questions as whether Spanish can be called a global language or instead only an international one. It suggests various tests that should be applied in order to consider what constitutes a global language. I will conclude by speculating on the future spread and role of Spanish, particularly in the U.S. and in its interaction with English.