I agree with Rachel not to make too much of that kind of mystical Kabbalistic thinking. I seriously doubt Tolkien would have known about it - most Jews don’t. As for understanding Semitic languages - he was a professional linguistic scholar. While I’m not a scholar of the Bible, I can speak with authority here as I’m a professor of Linguistics as a day job - We know all kinds of things about all kinds of languages even if we don’t know much about the people who speak them.
I acually think he migh, maybe not much, but at least some. As some of the ideas therein where not irrelevant to the European Middle Ages. And Tolkien thought it to be important to know at least something about the people who speak a given language. He invented his world and its peoples exactly to have somebody to speak his inwented languages so he could inspect them better. As such Arda is actually a big linguistic laboratory for him to have his languages tried-and-tested therein.
I can give you a recent example why I find the assumtion of universality of values and their expressions dangerous.
Mybe you know we have a migrant crisis at our Easterm border currenlty. Some of migrants end in hospitals. After WWII and the communistic times Poland has a hugely homogenous culture. As such the ability to live in a multicultural context is not very developed. A middle-aged migrant mother and her two teenaged sons were taken to the hospital. There the mother was aksed to go to a separate room for a medical check-up alone. When she came back, one of her teenage sons slapped her publicly in the face. All the medical and other staff in the hospital was scandalised.
In Poland the current rules are:
1. you do not slap a woman
2. you do not raise your hand at your own parent
3. you do not slapp anybody publicly - the only exception being women who have been sexually harassed
1st rule follows from an ancient princple - that is actually being hard questioned and in process of being discredited right nowadays by modern ideas - that a woman is - at least publicly - to be respected as being the "live-giver" in the society and hitting her is akin to disrespecting life itself
2nd rule follows one of the 10th commandments
3rd rule follows spirit of the SotM
(That does not mean we do not have domestic violence. We do. But still it would be hard to find any Pole who would slapp his mother in public.)
The hospital staff assumes those values to be universal. But they aren't.
They are not aware that the migrants follow different rules. For them a sign of their filial piety, love and care for their mother is to protect her "honour". The slapp served to remind her of it. They will have a hard way to learn that in Poland you can disregard your mothers wished as to who you do marry, what profession do you choose or if you have tatoos or not, but you cannot slapp her. Because in their culture you show your respect to your mother by listening to her regarding who you do marry, what profession do you choose or if you have tatoos, but there are situation which do warrant you hitting her (which I find mingboggling myself, but still, so it is).