python-mnemonic VS Seedshift

Yes. BIP39 defines a check word to ensure the previous words are correct. You can read the spec here: https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki

ColdCard follows the BIP-39 standard for encoding the wallet's seed as a series of 24 words (a.k.a. "seed menmonic", sometimes called a recovery phrase). If you followed the instructions you were given when initializing it and you've stored your seed mnemonic safely in the real world (not digitally where it can be more easily discovered), you're fine. In the event you lose or damage your ColdCard, you can initialize a new wallet--ANY wallet that follows the BIP-39 standard, which is pretty universal these days--and the wallet will regenerate the same private keysthat your original ColdCard did, in the same order.

... and BIP-39

Look-up "BIP32", "BIP39" and "BIP44", those will point you to documents describing precisely how seed phrases are converted into crypto keys.

i think bip39 is what you want to look up.

Not correct See this: https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki

try this tool for plausibly deniable steganographic encryption of BIP-39 mnemonic seed words. It is very cool but keep in mind you need to be careful each time you add complexity to the whole process https://github.com/mifunetoshiro/Seedshift/

Pertaining to recent events (both the FTX collapse and LastPass hack), self-custody of your crypto and with it safe backup of your mnemonic seed words has never been more warranted I think. I keep my seed words secured in a local KeePass database in a few different places, but this guy kept them on LastPass. I wrote this script a few years ago to be able to securely write them down in an easy human-readable format and not have to worry about it even if a thief/hacker came across them: https://github.com/mifunetoshiro/Seedshift

Piece of paper, steganographically encrypted with https://github.com/mifunetoshiro/Seedshift

I developed a method that steganographically encrypts your seed words in a plausibly deniable way using a date-shift cipher: https://github.com/mifunetoshiro/Seedshift

There is an x amount of crypto I put there as an award for whomever manages to get ahold of it. It is encrypted with a date shift cipher using this script I wrote: Seedshift. I basically used 1-4 dates in YYYY-MM-DD format to shift the mnemonic words (modulo 2048 to wrap around the wordlist, you can do it manually without the script).

Also, it's not recommended nor safe to store seed words directly in plain-text in either cloud or local backups. If you do, at least obfuscate them somehow. I personally use a date shift cipher when writing down/saving my seed words (https://github.com/mifunetoshiro/Seedshift) which you can also do by hand.

I use a date shift cipher on my seed words, so even if someone comes across it, it would be useless for them. I wrote a script for it: https://github.com/mifunetoshiro/Seedshift