Bip39 Dictionary. Even though you will discover BIP39 wordlists in languages aside from English, it is actually strongly not proposed to use non-English words for wallet backups. It might make restoring the wallet tough or impossible. BIP39 specifies a list of 2048 words from which the mnemonic phrase is decided https://nybookmark.com/story20531519/bip39-wallet-https-linktr-ee-bip39-top-guidelines-of-bip39-passphrase