Bip39 is not defined https://ameblo.jp/generate-bip39brooks/entry-12913353546.html Though it takes advantage of BIP32 method you are able to nevertheless import BIP39 seeds into Electrum wallet. Also aside from BIp32 there is BIP44 version which some wallet use for the generation of seeds. Vault12 is the pioneer in copyright inheritance administration. Look at https://mysterybookmarks.com/story20191833/bip39-seed-phrase-the-single-best-strategy-to-use-for-bip39-recovery-tool-https-x-com-tundra838554