"Option to set language of your post. Why So you can hide posts from your feed that you simply don't understand."

Excellent Idea! if nothing else, it would certainly cut down on the number of times that we would need to use Google Translate. :)

"Let us edit or delete posts forever."

Edit, yes! But did you know that posts can never actually be deleted. Even when you edit posts, the previous versions are always kept in the blockchain for anyone to see. They can never be deleted.