Every time a checksum is invalid, alert the user the phrase will not be something generated by your application, and talk to if they want to use it in any case. In this manner, your app only has to maintain the wordlists in your supported languages, however , you can https://guideyoursocial.com/story4110842/the-fact-about-valid-bip39-seed-phrase-that-no-one-is-suggesting