Bip39 library http://www.video-bookmark.com/user/tucanewhmt While it employs BIP32 strategy you could still import BIP39 seeds into Electrum wallet. Also other than BIp32 there is BIP44 version which some wallet use for the generation of seeds. Such as, in case you to begin with build your wallet and generated seed working with https://socialtechnet.com/story5362924/when-was-bip39-introduced-5-essential-elements-for-bip39-word-list-pdf-https-www-youtube-com-channel-ucupxfytj0fb78sq55hu6ocw