I’ve been thinking about how to make this idea workable while avoiding long, irrelevant or copyrighted texts. I thought, why don’t we write the texts ourselves?
We could write a short paragraph of a few sentences in our target language and receive comments about it from native speakers / other learners, or reversely we write a few sentences in our native language and others translate it to English, receiving comments from the native speaker (and possibly from native English speakers about the grammar of the translation).