I had the same problem with the Open Sans font, and it took me 3 hours to fix it until I found a solution.
Try specifying the subset corresponding to the glyphs for your language, for example, in my case:
from this
<link href='//fonts.googleapis.com/css?family=Open+Sans:300,400,700' rel='stylesheet' type='text/css'>
to
<link href='http://fonts.googleapis.com/css?family=Open+Sans:300,400,700&subset=latin,latin-ext' rel='stylesheet' type='text/css'>
See if this fixes your problem. Obviously, make sure you check to see if the font you are using supports additional subsets . Do not forget that they also support Cyrillic and Extended Cyrillic .
Cheers, Michael.
source share