Duck Tongue Tacos

Name: Duck Tongue Tacos
Ingredients: One 16-ounce bottle hot sauce, preferably Valentina; 2 tablespoons kosher salt; 1 tablespoon achiote paste; 5 cloves garlic, smashed; 2 bunches fresh cilantro, rough chopped; 3 pounds duck necks; 2 pounds whole duck tongues; 10 scallions, minced; Canola oil, for frying; Twelve 4-inch white corn tortillas; Salt; 2 cups red wine vinegar; 1/4 cup sugar; 2 tablespoons salt; 1 serrano chile, cut in half; 1 large red onion, thinly sliced; 4 tablespoons canola oil; 6 ounces queso fresco, finely grated