Bip39 Format Despite the fact that it employs BIP32 system you may still import BIP39 seeds into Electrum wallet. Also other than BIp32 There's BIP44 version which some wallet use for the era of seeds. A number of people again up their wallet seed phrases or private keys on paper, https://bookmark-rss.com/story18385405/bip39-light-standard-the-2-minute-rule-for-seed-phrase-generator