Bip39. Even though there are actually BIP39 wordlists in languages other than English, it is actually strongly not advised to make use of non-English words for wallet backups. It'd make restoring the wallet challenging or not possible. At its Main, a BIP39 passphrase modifies the cryptographic technique of wallet era. https://bookmarksystem.com/story18520071/bip39-wallet-https-linktr-ee-bip39-the-best-side-of-bip39