In some situations you might see duplicate font file requests in your request waterfall, e.g.
- https://yoursite.url/wp-content/uploads/omgf/stylesheet-name/roboto-latin.woff2
- https://yoursite.url/wp-content/uploads/omgf/stylesheet-name/roboto-latin-ext.woff2
Then this is due to the Used Subset(s) setting. By default, this is set to include Latin and Latin Extended. This default setting covers all languages (and alphabets) used in the American and European continent.
For each subset you select, a separate font file is required. Following the above example, you might not need the Latin Extended subset (this is only required for Eastern European languages, which don’t use the Greek or Cyrillic alphabet, e.g. Hungarian and Czech) so deselecting the Latin Extended option in the Used Subset(s) setting will chop your font file requests in half!