Word + Bib While it takes advantage of BIP32 technique it is possible to however import BIP39 seeds into Electrum wallet. Also apart from BIp32 There is certainly BIP44 Edition which some wallet use to the era of seeds. Any individual else who discovers the phrase can steal the bitcoins. https://webcastlist.com/story19695237/bip39-word-list-trust-wallet-indicators-on-bip39-phrase-you-should-know