With T135465 and T135464, we are reducing footprint of webfonts as most of languages are already supported by modern OSs. Investigate and update (or remove) webfonts accordingly.
Webfonts were introduced for Wikimedia projects in 2011 to solve problems for some scripts where fonts were not available for most commonly used devices/operating systems, or the fonts were not recent enough to support the script fully.
Read more about Webfonts and their use on Wikimedia projects.