Bip39 github https://www.symbaloo.com/mix/bookmarks-xfkm While it uses BIP32 technique it is possible to however import BIP39 seeds into Electrum wallet. Also apart from BIp32 there is BIP44 Model which some wallet use for the era of seeds. Thanks to the cryptographic layout of BIP-39, a weak passphrase won't lessen the security https://bookmarkangaroo.com/story20780620/bip39-mnemonic-seed-phrase-the-5-second-trick-for-bip39-compatible-wallet-https-cutt-ly-uryc5rw7