Bip39 alternative https://andersonsaeu988.iamarrows.com/bip39-generator-online-the-best-devices-for-secure-wallet-creation Though it uses BIP32 system you could continue to import BIP39 seeds into Electrum wallet. Also aside from BIp32 There exists BIP44 version which some wallet use for the technology of seeds. Not like standard wallets derived only from a seed phrase, passphrase-sec... https://minibookmarks.com/story20044371/bip39-vocabulary-5-essential-elements-for-bip39-word-list-pdf-https-www-youtube-com-channel-ucupxfytj0fb78sq55hu6ocw