Answer: This is not a simple question. It depends on the level of a person’s attainment.
If he attains Kabbalah at the highest level, he will definitely know Hebrew, and this language will become the most native internal language for him. With his inner sight, he will see a combination of positive and negative forces that draw letters for him, which he will feel and hear. He will master Hebrew perfectly.
Many years ago, I received a letter from Siberia that was sent to me through many people from a person who was in jail there. Without knowing any Hebrew, he suddenly started to write in this language. When I showed this letter to Rabash he said, “This person experienced great suffering and as a result of it, Hebrew and the spiritual knowledge were revealed to him, which he described absolutely correctly and very highly.”
It is not a miracle, but an attainment. There are no miracles.
From the Kabbalah Lesson in Russian 1/22/17