Bip39 Tool. Though there are actually BIP39 wordlists in languages aside from English, it is actually strongly not advisable to utilize non-English words for wallet backups. It'd make restoring the wallet difficult or extremely hard. BIP39 specifies a list of 2048 words from which the mnemonic phrase is decided on. https://userbookmark.com/story18640564/bip39-word-list-pdf-https-linktr-ee-bip39-getting-my-ian-coleman-bip39-to-work