Bip 39 github https://www.tumblr.com/generalllamacolor/787594721599078400/can-you-depend-on-online-bip39-generators-a Even though it works by using BIP32 technique you'll be able to still import BIP39 seeds into Electrum wallet. Also apart from BIp32 There is certainly BIP44 Edition which some wallet use to the era of seeds. BIP39 solves this through the use of human-readable seed https://bookmarkfox.com/story5610641/bip39-russian-5-tips-about-bip39-standard-you-can-use-today-https-cutt-ly-uryc5rw7