-\babelfont{rm}[BoldItalicFont={Old Standard Italic},
-BoldItalicFeatures={RawFeature={+embolden=2}}]{Old Standard}
-
-\babelfont[greek]{rm}[RawFeature={+ss05;+ss06},
-BoldItalicFont={Old Standard Italic},
-BoldItalicFeatures={RawFeature={+embolden=2}}]{Old Standard}
+\babelfont{rm}[Path = otf/,
+ItalicFont={OldStandard-Italic.otf},
+BoldFont={OldStandard-Bold.otf},
+BoldItalicFont={OldStandard-Italic.otf},
+BoldItalicFeatures={RawFeature={+embolden=2}}]{OldStandard-Regular.otf}
+
+\babelfont[greek]{rm}[Path = otf/,
+RawFeature={+ss05;+ss06},
+ItalicFont={OldStandard-Italic.otf},
+BoldFont={OldStandard-Bold.otf},
+BoldItalicFont={OldStandard-Italic.otf},
+BoldItalicFeatures={RawFeature={+embolden=2}}]{OldStandard-Regular.otf}