Word List Bip39 Even though it employs BIP32 method you'll be able to continue to import BIP39 seeds into Electrum wallet. Also apart from BIp32 There's BIP44 Variation which some wallet use for that technology of seeds. Lots of people again up their wallet seed phrases or non-public keys on https://thebookpage.com/story3987551/bip39-pdf-the-basic-principles-of-seed-phrase-generator