Bip39 Checksum. Though there are BIP39 wordlists in languages aside from English, it is strongly not encouraged to implement non-English words for wallet backups. It might make restoring the wallet difficult or difficult. What constitutes a "excellent wallet" is one which has distinct, simple to obtain documentation on supported BIP https://kingslists.com/story20139443/bip-39-https-linktr-ee-bip39-not-known-facts-about-bip39