Every now and again, the question crops up what the definition for either an International or a national would be. Various suggestions were proffered on this site (title, local content, ISSN, etc).
As there is no single definition, as far as I know, I would humbly suggest the following:
The van Wingerden criteria for an International journal:
1. one- quarter (25%) of the editorial board/ associate or assistant editors reside/ are employed outside the country of publication.
2. > one-third (33%) of the total number of papers published originate from outside the country of publication.
3. > half (50%) the total number of subscriptions originates from institutions or individuals outside the country of publication.
Pro's & con's:
ad nr 1: one starts a journal for a specific interest group/ subject; one would have to guard against inbreeding (presenting the view from "inside" in a lesser known language)
ad nr 2: once the journal gets going, international recognition is nice; nr 1 already opens the door (intl. editorial board/ advisors) international interest groups may follow.
ad 3. the journal obviously flourishes due to its interesting content and the hard work of editors and publishers alike. Congrats.
Agree/ Disagree ?- but then with a (good) reason