Forte is indeed in Hungary, and Efke in Croatia, and Foma in the Czech Republic, and Slavich in Russia.
Maybe John from J&C has some news. He's been straightforward about such things all along. The only Forte product I use is J&C Classic 400. From the Efke plant I use Efke PL100 and J&C Exposition graded paper (which I formerly used under the Cachet label).