When was bip39 introduced https://www.tumblr.com/generalllamacolor/787594721599078400/can-you-depend-on-online-bip39-generators-a Despite the fact that it works by using BIP32 system you are able to however import BIP39 seeds into Electrum wallet. Also besides BIp32 there is BIP44 version which some wallet use to the generation of seeds. Because introducing a passphrase for your seed ... https://top10bookmark.com/story20300244/bip39-seed-to-mnemonic-bip39-ian-coleman-for-dummies-https-www-youtube-com-channel-ucupxfytj0fb78sq55hu6ocw