Kabbalah needs no words at all. It's just that right now this is the most convenient way to connect with the material one studies.
Some people connect best through music.
They listen to the melodies written by Ba'al Hasulam and can progress just as much as those who bond with him through his writings. Of course when we seat in a room not understanding one word that is said we won't feel very comfortable, but that has nothing to do with how fast we progress. All that matters is how badly we want it. When we say that there are no genuine kabbalists outside of Israel, it definitely means that there is no one, outside of Israel, who can communicate directly with the Creator. Even in Israel not all those who claim to be kabbalists really are so.