Hosea did not prophesy to the nations.  His concern was exclusively with Israel.  Other nations were either false lovers or false saviors, and will end up being Israel's judges:

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          When Ephraim saw his sickness, and Judah his sores, then Ephraim turned to Assyria, and sent to the great king for help. But he is not able to cure you, not able to heal your sores (Hos 5:13).

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          Ephraim is like a dove, easily deceived and senseless— now calling to Egypt, now turning to Assyria (Hos 7:11).

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          Will they not return to Egypt and will not Assyria rule over them because they refuse to repent? (Hos 11:5).