Among our crosswords and other puzzles, we’ll be featuring linguistic challenges from around the world from puzzle aficionado and writer Alex Bellos. A PDF of the puzzle, as well as the solution, can be downloaded below. In Estonia, there is no sex and no future. This has nothing to do with the very real decline in fertility rates in this European country of 1.3 million people on the Baltic Sea. Rather, it is about the Estonian language, which has no grammatical gender and no future tense. Estonian is spoken by…