In the times of James I. of England and Philip III. of Spain, certain merchants at London happened to have a claim upon Philip, which his ambassador Gondemar did not think fit to satisfy. They applied for counsel to Selden, who advised them to sue the Spanish monarch in the court of King's Bench, and prosecute him to an outlawry. They did so: and the sheriffs of London were accordingly commanded, in the usual form, to take the body of the defendant Philip, wherever it was to be found within their bailiwick. As to the sheriffs, Philip, we may believe, was in no great fear of them: but, what answered the same purpose, he happened on his part to have demands upon some other merchants, whom, so long as the outlawry remained in force, there was uno proceeding against. Gondemar paid the money (Selden's Table-Talk, tit. Law). This was internal jurisprudence: if the dispute had been betwixt Philip and James himself, it would have been international.
As to the word international, from this work, or the first of the works edited in French by A. Dumont, it has taken root in the language. Witness reviews and newspapers.IPML Chapter 17 Section 2