Bip39 Seed Phrase. Although there are BIP39 wordlists in languages aside from English, it's strongly not advisable to use non-English words for wallet backups. It'd make restoring the wallet difficult or unachievable. Anyone else who discovers the phrase can steal the bitcoins. It have to be retained mystery, for example https://top10bookmark.com/story19056226/bip39-https-linktr-ee-bip39-how-much-you-need-to-expect-you-ll-pay-for-a-good-ian-coleman-bip39