Interesting
Chess Notation (Important part of Chess)!!!

ICCF Numeric is totally unambiguous regardless of one's language. (or age )
is this the numeric international postal notation? e.g. the Ruy Lopez is : 1. 5254 5755 2. 7163 2836 3. 6125 etc..
Yep, that's the stuff. I suppose it's really only universal for people who use arabic numbers. People who use cyrillic or something else would still have to learn something foreign to understand it.

Sorry so late. I'm just catching up on unfinished business before wandering off.
Nbd5 indicates that both Knights are able to move to the d5 square and that the Knight that's moving is the one on the b file. So basically it means move the Knight on the b file to the d5 square. If both Knights were on the same file it would indicate which one to move by using the rank number. For instance, N4d5 would mean to move the Knight on the fourth rank (not the one on the 6th rank) to d5.
In even earlier days the Knight to move would be designated by whether it was the King's Knight (KNd5) or Queen's Knight (QNd5). Rooks were done the same as Knights. Earlier with the King/Queen designation, later with the rank or file designation. The King/Queen designation could get very confusing if the King-side pieces were not marked as such. (They used to be, and still are in some sets.) That probably led to the rank and file designation.
Then Descriptive Notation was dropped altogether in favor of the now universal Algebraic. In some ways that;s too bad. To me, descriptive notation is easier to follow in my head than algebraic.

Chess notation is the "language" we use to note our chess moves. Say a4- it means move the pawn on the a file to a4. B= bishop K=king N=knight Q=queen R=rook- by the way payn is NOT P it simply has no symbol just put the square its moving too. x means takes a piece. For example Bxd4 means the bishop toook the piece on d4. There are several chess columns-they are letters a-h. For Example, a4-the piece on a4-d7-the piece on d7. There are also several rows which are numbers 1-8. By the way, + means check, ++ means double check, and # means checkmate. The symbol for king side castling is O-O and queen side castling (is different thank king side- it is O-O-O. Here is an example of one move:
Those are official chess notations and you had to learn these if you want to play OTB especially tournaments. But if you want to make these things more simple, I think letters and numbers are enough if you are going to read it only for yourself. Just add L for long castle and S for short castle.

a subquestion is it legal to use other language notation if I enter an english tournament in the US or else where.
I use S for knight in denmark springer N
and T for Rook tårn opposed to R
and L for bishop løber opposed to B
and D for queen dronning opposed to D
and K for king. konge opposed to K
or will it be illegal notation.
That's perfectly OK.
^ From the 2023 edition of the official FIDE rules.

I think properly done chess notation is extremely important. it is almost impossible to accurately play through and analyze a game if there are inaccuracies. also i think there is a direct correlation between chess strength and proper notation. it shows a visual and mental understanding of the board.

Even algebraic has variations. Regular algebraic and Long Algebraic.
Descriptive.
e4 = Pawn to King 4. P-K4.
Have you ever read any chess books written hundreds of years ago?
"The Pawn of the King's Rook advances to the fourth house."
danish, swedish, norwegian and German are identical as for notation.
http://en.wikipedia.org/wiki/Algebraic_chess_notation
D for queen is actually used 18 countries. but I doubt that it means queen in all of the countries and I am to lazy to test everyone out in Google Translate.
look in the section: Naming the pieces in various languages