Tolkien and Zamenhof are two of imaginary languages' most successful proponents – yet their aims were very different.
'Winter is Coming' and 'All Men Must Die' are Game of Thrones' watchwords. But do they offer clues to an ending for the show – and the books?
Quenya, Sindarin, Klingon and Dothraki – there's an art to making up languages.
J R R Tolkien died over 40 years ago and since then there have been over 30 titles bearing his name. Is this warranted?