Bip39 offline https://www.sbnation.com/users/typhanhmdy While it takes advantage of BIP32 process you can still import BIP39 seeds into Electrum wallet. Also apart from BIp32 There is certainly BIP44 Edition which some wallet use with the generation of seeds. One example is, when you to begin with build your wallet and created https://ragingbookmarks.com/story20142917/bip39-mnemonic-seed-phrase-the-greatest-guide-to-bip39-https-t-me-bip39-chat