It’s BIP-39, but totally the right track. You can check manually, if some of the words have close cousins that could it be also. I think, they designed the list so that there are no words that are too similar, but don’t know how successful they were.
The mnemonic seed phrase has a built-in checksum. So a script can check if it’s totally wrong, before having to manually check in Yoroi. I’ve written one to check in the case of one word missing. Brings the possibilities to check down from 2048 to 64.
But it does not check for close cousins of all words in the seed phrase, up to now.
Checking for wrong order is even more difficult, because there are so many possibilities to check.
The missing word thing is here:
If you or he know some Python, it can perhaps be adapted to order, close cousins, … I won’t have time for that this week, I fear.