Bip39 Vs Slip39 Or for very substantial security, you might "roll your individual" seed phrase with dice or even a calculator as offline approaches. This can create a bundle that only contains the chinese_simplified wordlist, and it will be the default wordlist for all phone calls devoid of explicit wordlists. https://bookmarktiger.com/story18584489/bip39-passphrase-how-much-you-need-to-expect-you-ll-pay-for-a-good-bip39