Alright, this might be by far the smallest number on the list, but its significance should not be underestimated. Thanks to the vast community and initiatives like the WordPress Global Translation Day, the number of languages which WordPress is available in is steadily growing. From Albanian, Dutch and Japanese all the way to Icelandic, Persian and even Scottish Gaelic, you can set your WordPress dashboard to (almost) any language you like.
In 2014, non-English downloads already surpassed English downloads, a number that has likely increased in the two years since. That means, by now many plugins and features first appear in another language and are translated into English instead of the other way around.
This focus on multi-language support opens up opportunities for WordPress users worldwide. Plus, don’t worry if your preferred language is not available yet (though what more than Scottish Gaelic can you want?), WordPress contributors are constantly working on expanding the list of WordPress translations. Of course, contributions from other users (like you) are always welcome!