How should we tag questions about English-language literature?

Question

After a lot of different questions about the issue of tags based on languages and/or countries, we eventually came to the conclusion that tags such as russian-literature are useful even on questions about specific works; furthermore, we also clarified that such tags should refer to languages and not countries or cultures, since the latter can sometimes be much harder to define.

However, there's an important special case still unresolved. In all of these discussions, we've made an exception, implicitly or explicitly, for works of literature written in English. The question Should we have language-specific tags (excluding one for English)? (which I've now voted to close as a dupe, by the way) has the caveat right there in the title, and my answer here also deliberately skirts around the issue of English-language literature.

However, we now have an american-literature tag with 16 questions, so perhaps it's time to actually have this debate and work out what we want. As I see it, there are three options:

1. use a english-literature tag for all questions about literature in the English language;
2. use tags like american-literature and australian-literature for different English-speaking subcultures;
3. don't tag English-language questions at all, with the implicit assumption that if a question about a book doesn't have a language tag, then it was written in English.

Which of these routes should we take, and why?

Answer 1

Option #2 is right out.

• Inconsistency is the devil. If we're using language-based instead of country-based tags for non-English languages, we shouldn't turn around and use country-based tags for English. That's just inconsistent and confusing.
• Most of these areas also produce non-English literature. Shouldn't a question about Aborigine literature be tagged with australian-literature? Or a question about Scots Gaelic literature tagged with scottish-literature? This relates to the previous bullet point, but it shows why inconsistency is dangerous - because there's overlap.
• The same reasons as before. Many of the issues I described here would still be issues if we used country-based tags for English literature. Take a book like Neil Gaiman's American Gods - it was written by an English author living in America, set in America but (I believe) more popular in Britain. In many cases, you can't even look at the book to decide whether it's written in (e.g.) British or American English, as you can with language tags, because there are editions in both.

Option #1 feels unnecessary.

I could go either way on this, honestly, but a single overarching english-literature tag would probably be used on the majority of all our questions, which feels a bit over-the-top. Especially when instead of having a specific tag to mark these questions, they could just be marked by the absence of any other language tag.

Besides, are we likely to have any users who are experts in English literature as a whole and will want to search that tag? Far more likely, surely, that they'll be experts in some specific subcategory.