Indeed. For example a Tweet from Eric van Haren is displayed in Dutch, but the tiltle is translated with the text in English. That way, you still keep the authenticity of the message, and everyone can read it.
There is no such a option as of right now. This also has more to do with the software itself (Lemmy) than lemmy.world. I suggest to visit their GitHub: https://github.com/LemmyNet/lemmy
Also, maybe some third-party developers can add this. In that case, you can ask the developer of your favourite app!
No it has the spoilers in the sidebar. You know, that thing you see next to every post. Besides that, the F1 subreddit posts always a graphic with the race winner, the same graphic you see in the... sidebar!
We are planning to do it on major releases too. Starfield for example. But I think there has to be some form of urgency to make a discussion thread for a game.
Super! We will remember this one!