The internationality of the Spanish journals indexed in WoS and Scopus is analyzed, based on four main elements identified in the bibliographic review: articles in English, articles by foreign authors, international collaborations, and foreign members of the editorial teams. It is found that the subject area and the type of access are decisive in terms of the degree of internationality of the journals, as well as, to a lesser extent, the type of publisher. The Impact Factor (IF), the flagship of bibliometric impact, does not correlate with any element of internationality, while the SJR and SNIP values moderately correlate with the percentages of international collaborations. The participation of foreign authors is related to the presence of English, revealing the orientation of the indexed Spanish journals towards the countries of the scientific “core”. The presence of foreign members in the committees is accompanied by that of foreign authors, although a cause-effect relationship cannot be demonstrated. It concludes with contributions on possible future lines of research.