Every time a checksum is invalid, alert the person the phrase just isn't a little something produced by your app, and inquire should they wish to use it anyway. This way, your app only needs to keep the wordlists for your personal supported languages, however, you can recover phrases created https://e-bookmarks.com/story4416850/the-fact-about-bip39-seed-phrase-word-list-that-no-one-is-suggesting