tongue and tripe dishes east of La Cienega?
Tacos de lengua at El Taurino, on Hoover at 11th.
Tongue sandwiches at Langer's.
Tongue salad with canellini beans and salsa verde at Cut (not quite in your area, but among the most delicious things I have ever tasted)
Colombian tripe stew at La Fonda Antioquena
Caucau at Mario's Peruvian seafood
Tongue and/or tripe barbecue at Sa Rit Gol
For the classic Sichuan cold tongue and tripe dish, you'll have to go to Oriental Pearl in San Gabriel