they did not invade Texas, but a few of them joined in on the OSR Retroclone OGL movement. That's role playing like D&D, but in French, named Epees & Sorcellerie. Freely translated "Swords & Sorcery", by Nicolas Dessaux.
And now, for those of you who do not speak French as a native, Epees & Sorcellerie has been translated to English by David Macauley, under the flag of Frightful Hobgoblin, and made available on Lulu. Free as a pdf, or for a fistful of dollars or euros as a pocketbook.
Actually, it looks quite nice, simple and atmospheric. With medieval woodprints for artwork, and some nice original spells and monsters. And a few rules that might actually be better than D&D pure style. E&S is a kind of tiny rival to S&W, certainly not lost in translation.