No need to get snippy, now. And sorry, let me rephrase that: You need to be completely, completely fluent in English (or have an extremely good beta) to post stories of good quality. Language is about expression and the accuracy to express yourself. Storytelling is much of the same but with an attention to detail-- it's about showing the story, immersing the reader in the situation; a feat which is quite difficult for those who are not fluent. As you said, a lot of authors aren't fluent in English in this fandom-- so why does everyone feel they must adhere to it?