The Spanish hablar (“to talk”) comes from the Latin fabulare, as we’ve previously discussed. The initial F- turned into an H- happens only in Spanish (think fig vs higo.)
From the same root, however, also comes the English ineffable, that SAT word meaning “unable to be described in words.” So, ineffable literally means “without” (in-) and “speaking” (fabulare).
We see the h-b-l of hablar map to the (in-)f-b-l of ineffable quite clearly!