\usepackage[greek.ancient,english]{babel}
\babeltags{grc = greek}
+% \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}
+
\babelfont{rm}[Path = otf/,
ItalicFont={OldStandard-Italic.otf},
BoldFont={OldStandard-Bold.otf},
-BoldItalicFont={OldStandard-Italic.otf},
-BoldItalicFeatures={RawFeature={+embolden=2}}]{OldStandard-Regular.otf}
+BoldItalicFont={OldStandard-BoldItalic.otf}]{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}
+BoldItalicFont={OldStandard-BoldItalic.otf}]{OldStandard-Regular.otf}
\babelfont{tt}{CMU Typewriter Text}