This is my first time posting in this forum, so please bear with any translation inaccuracies, as my English relies entirely on Google Gemini.
After saying all this, I wonder if Google can fully translate what I'm trying to express, hahaha."
Have you consider asking this question on one of local board where you speak the language? To see list of those local board, visit
https://bitcointalk.org/index.php and scroll down until you see text "Local".
Note that the checksum in BIP39 seeds is weak. A 12 word BIP39 seed only has a 4 bit checksum. There is a 1/16 chance that a random selection of 12 words from the wordlist is a valid seed.
Please also note, the crux of the issue lies in this alleviation/mitigation.
That chaotic combination of mnemonic phrases is a BIP-39 seed, but it cannot be imported into other mainstream wallets like Trust Wallet, Phantom, or MetaMask, even though these wallets do support BIP-39 seed phrases!!"
"That chaotic combination of mnemonic phrases can only be successfully imported into Electrum wallet using the [BIP-39] format option, which is the strangest part."
"All I've said so far is to express my suspicion that Electrum might have some unknown mechanism that causes this result
"Electrum might have some unknown mechanism"? Other member have stated it's because other wallet doesn't let you create wallet using mnemonic phrase with invalid checksum while Electrum does.