Bip39 php https://penzu.com/p/2ea6922b70254307 Regardless that it uses BIP32 strategy you'll be able to however import BIP39 seeds into Electrum wallet. Also besides BIp32 There is certainly BIP44 Variation which some wallet use with the generation of seeds. For words that only have 3 letters, there isn't a 4th letter. For https://bookmarkmargin.com/story20400777/bip39-js-the-smart-trick-of-bip39-word-list-github-that-no-one-is-discussing-https-linktr-ee-bip39