Note that the blog post about autogenerating Anki cards linked in the second answer ( https://sookocheff.com/post/language/bulk-generating-cloze-deletions-for-l

Note that the blog post about autogenerating Anki cards linked in the second answer ( https://sookocheff.com/post/language/bulk-generating-cloze-deletions-for-learning-a-language-with-anki/ https://sookocheff.com/post/language/bulk-generating-cloze-d... ) uses Tatoeba ( https://tatoeba.org https://tatoeba.org ) as the data source, which is also where Clozemaster gets its sentences from. You already said that those are bad for learning English, so Tatoeba may not be the solution for you. But that depends on what exactly you think is wrong with those sentences. I contribute to Tatoeba, mostly translating Mandarin into German, so I'm quite interested in hearing from end users.