I want to know about the chess piece design？？？

Today, while i research Nishapur, I found that when chess was transmitted to Persia, the "Rook" became the "Castle" and the "elephant" became the "Bishop." The design of modern international chess seems to have inherited this mistake, but I don't understand Why was the name of the chess piece referred to as "Rook" changed back to "Rook" instead of continuing to refer to it as a "Castle"?Why was the "Bishop" not changed back to "Elephant"? What are the reasons for this naming convention in the context of chess?

I captured this from this wiki entry: https://simple.wikipedia.org/wiki/Shatranj

The Sanskrit names from Chaturanga name the four parts of the old Indian army: foot soldiers, cavalry, elephantry and chariotry. The Arabic name for the chariot prevailed in the English language until today, like for example the Arabic name for elephant prevailed in Spanish.

The form of a tower was developed when the game came to Europe. Elephant and Vizier would become bishop and queen. A paragraph about the bishop from another wiki page: https://en.wikipedia.org/wiki/Bishop_(chess)

"The canonical chessmen date back to the Staunton chess set of 1849. The piece's deep groove symbolizes a bishop's (or abbot's) mitre. Some have written that the groove originated from the original form of the piece, an elephant[22][23] with the groove representing the elephant's tusks.[24] The English apparently chose to call the piece a bishop because the projections at the top resembled a mitre.[25] This groove was interpreted differently in different countries as the game moved to Europe; in France, for example, the groove was taken to be a jester's cap, hence in France the bishop is called fou (jester) [26] and in Romania nebun (meaning crazy, but also jester).[27]"

I have also read- in connection with this set- that the bishop's mitre/fool's cap interpretations were made from the form of the rook piece, but given to what the elephant piece would become, i.e. what form symbolized the chariot was what became the bishop or le fou (the court jester).

Thank you for the answer. The Arabic name for the chariot prevailed in the English language until today,But the  the Staunton chess set called a "rook" looks like a castle, why? As far as I know, the Staunton chess set  were invented in Britain.Why did the Persian word become "castle" when it spread to Spain and turn back to "rukh" when it spread to Britain? Is this a coincidence? It seems that the farther it spreads, the greater the difference should be, right?

Staunton is mid 19th century, the game came to Europe 10th century. Lots of history Here two more captures from another great wiki:

https://en.wikipedia.org/wiki/History_of_chess

(interesting piece values from the time of the old moves of ferz and elephant, but the screen capture is about the description of the abstract shapes provided)

To remind myself of the old chariot, I like to turn the rook piece by 90 degrees, lay it flat on the board and let it roll

While we have no written accounts (from the time) regarding the famous Lewis Chessmen, probably of "viking" origin, we can from their shapes deduce that there was a king, a queen, bishops and "cavalry".

Chess got into Spain during the Arab conquest of the Iberian peninsula. British people may have got the game directly from the Arabs during the Crusades, not through Spain.

Some cultures seem to have retained the original piece term, while others seem to have made new terms based on the look of the pieces in the design that predominated. For example, in Romanian, we probably call the Bishop "nebun" because of French influence, "nebun" being the equivalent of "fou" in French. We call the Rook "tura/turn" (tower) and the Knight "cal" (horse); the former could again be because of French influence ("turn" = "tour"), but the latter is definitely because of how the piece looks, probably because the game was popularized in Romania during late 19th century using the Staunton design and "knights" were not an element of Romanian social structure.

So there are definitely good reasons for how the piece names ended up what they are, but digging them up and finding evidence for how the names evolved is not easy, because the initial transmission of a game from a culture to another happens informally and doesn't leave records behind; it's only when the game achieves popularity and people start talking of it that you start finding proof of what terminology they used, but its origin and development will remain a matter of conjecture.

History of Chess

https://en.wikipedia.org/wiki/History_of_chess

History of Chess Pieces...

https://www.bing.com/search?q=history+of+chess+pieces&qs=n&form=QBRE&sp=-1&lq=0&pq=history+of+chess+pieces&sc=11-23&sk=&cvid=28DF62340A244A828EB5708D3B50F8D0&ghsh=0&ghacc=0&ghpl=