Bip39 first 4 letters https://www.anobii.com/en/01000289012ff9b293/profile/activity While it works by using BIP32 process you can still import BIP39 seeds into Electrum wallet. Also other than BIp32 There may be BIP44 version which some wallet use with the technology of seeds. BIP32 and BIP44 get the job done together to incorporate flexibility, https://bookmarkbells.com/story20465680/bip39-trust-wallet-the-smart-trick-of-bip39-word-list-github-that-no-one-is-discussing-https-linktr-ee-bip39