Pardon my ignorance
Bife de lomo is translated in post #26 as filet mignon. I have had bife de lomo at more than one Argentine restaurant here in Madrid, and it is not filet mignon. In fact, La Vaca Argentina and other Argentine restaurants here have both bife de lomo and solomillo, which is what filet mignon is called in Spain.
Would you ever find solomillo / filet mignon -- the loin of beef running down the cow's back -- in Buenos Aires?