Show support of non-latin characters
It would be great to see if a font support non-latin characters (like cyrillic), because by default browsers will substitute missing characters and it looks ugly (see screenshot)
Related with #11

Some fonts support it, btw. If you need help in finding out which fonts from catalogue are supporting cyrillic, I'll glad to help.
For example, Lato supports.

FWIW
| Font name | Support cyrillic |
|---|---|
| Alegreya | no |
| Alegreya Sans | no |
| Aleo | no |
| Andada | no |
| Anonymous Pro | !! yes |
| Bitter | !! yes |
| BPreplay | no |
| Cardo | no |
| Clear Sans | !! yes |
| Comic Neue | no |
| Crimson | ! yes (only 400 and 400i) |
| Domine | no |
| Droid Serif | no |
| EB Garamond | !! yes |
| Fira Mono | !! yes |
| Fira Sans | !! yes |
| Gentium Basic | no |
| Inconsolata | no |
| Karla | no |
| Latin Modern Mono | no |
| Latin Modern Roman | no |
| Lato | !! yes |
| Libre Baskerville | no |
| Libre Caslon Display | no |
| Libre Caslon Text | no |
| Linux Biolinum | !! yes (although it's strange on 700) |
| Linux Libertine | ! yes (700i no) |
| Lora | !! yes |
| Merriweather | no |
| Montserrat | no |
| Muli | no |
| Noto Sans | !! yes |
| Noto Serif | !! yes |
| Old Standard | !! yes |
| Open Sans | !! yes |
| Oswald | !! yes |
| Playfair Display | !! yes |
| PT Sans | !! yes (obviously) |
| PT Serif | !! yes (obviously) |
| Raleway | ! yes (not italic) |
| Roboto | !! yes |
| Roboto Condensed | !! yes |
| Roboto Slab | !! yes |
| Rokkitt | no |
| Sorts Mill Goudy | no |
| Source Code Pro | no |
| Source Sans Pro | no |
| Source Serif Pro | no |
| Telex | no |
| TeX Gyre Heros | no |
| Titillium | no |
| Ubuntu | !! yes |
| Vollkorn | ! yes (not italic) |
!! means that all variants look ok, ! means that some variant is missing
Thanks for this! I'll definitely keep this in mind for the upcoming redesign (#87). I'll likely be showing unicode ranges and/or displaying the full character set.