diff --git a/fonts/charis.css b/fonts/charis.css
index 4fcd07f38..e98488da8 100644
--- a/fonts/charis.css
+++ b/fonts/charis.css
@@ -3,6 +3,7 @@
 @font-face {
     font-family: 'Charis SIL';
     src: local('Charis SIL'), url('/fonts/charis/CharisSIL-Latin-Bold.woff2') format('woff2');
+    font-display: block;
     font-weight: bold;
     unicode-range: U+0000-007f,U+2000-206f,U+0080-00ff;
 }
@@ -10,6 +11,7 @@
 @font-face {
     font-family: 'Charis SIL';
     src: local('Charis SIL'), url('/fonts/charis/CharisSIL-Latin-BoldItalic.woff2') format('woff2');
+    font-display: block;
     font-style: italic;
     font-weight: bold;
     unicode-range: U+0000-007f,U+2000-206f,U+0080-00ff;
@@ -18,6 +20,7 @@
 @font-face {
     font-family: 'Charis SIL';
     src: local('Charis SIL'), url('/fonts/charis/CharisSIL-Latin-Italic.woff2') format('woff2');
+    font-display: block;
     font-style: italic;
     unicode-range: U+0000-007f,U+2000-206f,U+0080-00ff;
 }
@@ -25,12 +28,14 @@
 @font-face {
     font-family: 'Charis SIL';
     src: local('Charis SIL'), url('/fonts/charis/CharisSIL-Latin-Regular.woff2') format('woff2');
+    font-display: block;
     unicode-range: U+0000-007f,U+2000-206f,U+0080-00ff;
 }
 /* LatinExt (LatinExtendedA, CombiningDiacriticalMarks) */
 @font-face {
     font-family: 'Charis SIL';
     src: local('Charis SIL'), url('/fonts/charis/CharisSIL-LatinExt-Bold.woff2') format('woff2');
+    font-display: swap;
     font-weight: bold;
     unicode-range: U+0100-017f,U+0300-036f;
 }
@@ -38,6 +43,7 @@
 @font-face {
     font-family: 'Charis SIL';
     src: local('Charis SIL'), url('/fonts/charis/CharisSIL-LatinExt-BoldItalic.woff2') format('woff2');
+    font-display: swap;
     font-style: italic;
     font-weight: bold;
     unicode-range: U+0100-017f,U+0300-036f;
@@ -46,6 +52,7 @@
 @font-face {
     font-family: 'Charis SIL';
     src: local('Charis SIL'), url('/fonts/charis/CharisSIL-LatinExt-Italic.woff2') format('woff2');
+    font-display: swap;
     font-style: italic;
     unicode-range: U+0100-017f,U+0300-036f;
 }
@@ -53,12 +60,46 @@
 @font-face {
     font-family: 'Charis SIL';
     src: local('Charis SIL'), url('/fonts/charis/CharisSIL-LatinExt-Regular.woff2') format('woff2');
+    font-display: swap;
     unicode-range: U+0100-017f,U+0300-036f;
 }
+/* Cyrillic (Cyrillic) */
+@font-face {
+    font-family: 'Charis SIL';
+    src: local('Charis SIL'), url('/fonts/charis/CharisSIL-Cyrillic-Bold.woff2') format('woff2');
+    font-display: swap;
+    font-weight: bold;
+    unicode-range: U+0400-04ff;
+}
+/* Cyrillic (Cyrillic) */
+@font-face {
+    font-family: 'Charis SIL';
+    src: local('Charis SIL'), url('/fonts/charis/CharisSIL-Cyrillic-BoldItalic.woff2') format('woff2');
+    font-display: swap;
+    font-style: italic;
+    font-weight: bold;
+    unicode-range: U+0400-04ff;
+}
+/* Cyrillic (Cyrillic) */
+@font-face {
+    font-family: 'Charis SIL';
+    src: local('Charis SIL'), url('/fonts/charis/CharisSIL-Cyrillic-Italic.woff2') format('woff2');
+    font-display: swap;
+    font-style: italic;
+    unicode-range: U+0400-04ff;
+}
+/* Cyrillic (Cyrillic) */
+@font-face {
+    font-family: 'Charis SIL';
+    src: local('Charis SIL'), url('/fonts/charis/CharisSIL-Cyrillic-Regular.woff2') format('woff2');
+    font-display: swap;
+    unicode-range: U+0400-04ff;
+}
 /* ChineseTranslit (LatinExtendedB, SuperscriptsandSubscripts) */
 @font-face {
     font-family: 'Charis SIL';
     src: local('Charis SIL'), url('/fonts/charis/CharisSIL-ChineseTranslit-Bold.woff2') format('woff2');
+    font-display: swap;
     font-weight: bold;
     unicode-range: U+0180-024f,U+2070-209f;
 }
@@ -66,6 +107,7 @@
 @font-face {
     font-family: 'Charis SIL';
     src: local('Charis SIL'), url('/fonts/charis/CharisSIL-ChineseTranslit-BoldItalic.woff2') format('woff2');
+    font-display: swap;
     font-style: italic;
     font-weight: bold;
     unicode-range: U+0180-024f,U+2070-209f;
@@ -74,6 +116,7 @@
 @font-face {
     font-family: 'Charis SIL';
     src: local('Charis SIL'), url('/fonts/charis/CharisSIL-ChineseTranslit-Italic.woff2') format('woff2');
+    font-display: swap;
     font-style: italic;
     unicode-range: U+0180-024f,U+2070-209f;
 }
@@ -81,12 +124,14 @@
 @font-face {
     font-family: 'Charis SIL';
     src: local('Charis SIL'), url('/fonts/charis/CharisSIL-ChineseTranslit-Regular.woff2') format('woff2');
+    font-display: swap;
     unicode-range: U+0180-024f,U+2070-209f;
 }
 /* VietIndic (LatinExtendedAdditional) */
 @font-face {
     font-family: 'Charis SIL';
     src: local('Charis SIL'), url('/fonts/charis/CharisSIL-VietIndic-Bold.woff2') format('woff2');
+    font-display: swap;
     font-weight: bold;
     unicode-range: U+1e00-1eff;
 }
@@ -94,6 +139,7 @@
 @font-face {
     font-family: 'Charis SIL';
     src: local('Charis SIL'), url('/fonts/charis/CharisSIL-VietIndic-BoldItalic.woff2') format('woff2');
+    font-display: swap;
     font-style: italic;
     font-weight: bold;
     unicode-range: U+1e00-1eff;
@@ -102,6 +148,7 @@
 @font-face {
     font-family: 'Charis SIL';
     src: local('Charis SIL'), url('/fonts/charis/CharisSIL-VietIndic-Italic.woff2') format('woff2');
+    font-display: swap;
     font-style: italic;
     unicode-range: U+1e00-1eff;
 }
@@ -109,12 +156,14 @@
 @font-face {
     font-family: 'Charis SIL';
     src: local('Charis SIL'), url('/fonts/charis/CharisSIL-VietIndic-Regular.woff2') format('woff2');
+    font-display: swap;
     unicode-range: U+1e00-1eff;
 }
 /* Historical (LatinExtendedD) */
 @font-face {
     font-family: 'Charis SIL';
     src: local('Charis SIL'), url('/fonts/charis/CharisSIL-Historical-Bold.woff2') format('woff2');
+    font-display: swap;
     font-weight: bold;
     unicode-range: U+a720-a7ff;
 }
@@ -122,6 +171,7 @@
 @font-face {
     font-family: 'Charis SIL';
     src: local('Charis SIL'), url('/fonts/charis/CharisSIL-Historical-BoldItalic.woff2') format('woff2');
+    font-display: swap;
     font-style: italic;
     font-weight: bold;
     unicode-range: U+a720-a7ff;
@@ -130,6 +180,7 @@
 @font-face {
     font-family: 'Charis SIL';
     src: local('Charis SIL'), url('/fonts/charis/CharisSIL-Historical-Italic.woff2') format('woff2');
+    font-display: swap;
     font-style: italic;
     unicode-range: U+a720-a7ff;
 }
@@ -137,5 +188,6 @@
 @font-face {
     font-family: 'Charis SIL';
     src: local('Charis SIL'), url('/fonts/charis/CharisSIL-Historical-Regular.woff2') format('woff2');
+    font-display: swap;
     unicode-range: U+a720-a7ff;
 }
diff --git a/fonts/charis/CharisSIL-Cyrillic-Bold.woff2 b/fonts/charis/CharisSIL-Cyrillic-Bold.woff2
new file mode 100644
index 000000000..fbb3897eb
Binary files /dev/null and b/fonts/charis/CharisSIL-Cyrillic-Bold.woff2 differ
diff --git a/fonts/charis/CharisSIL-Cyrillic-BoldItalic.woff2 b/fonts/charis/CharisSIL-Cyrillic-BoldItalic.woff2
new file mode 100644
index 000000000..3fed4f9df
Binary files /dev/null and b/fonts/charis/CharisSIL-Cyrillic-BoldItalic.woff2 differ
diff --git a/fonts/charis/CharisSIL-Cyrillic-Italic.woff2 b/fonts/charis/CharisSIL-Cyrillic-Italic.woff2
new file mode 100644
index 000000000..ab92a3178
Binary files /dev/null and b/fonts/charis/CharisSIL-Cyrillic-Italic.woff2 differ
diff --git a/fonts/charis/CharisSIL-Cyrillic-Regular.woff2 b/fonts/charis/CharisSIL-Cyrillic-Regular.woff2
new file mode 100644
index 000000000..3275a6584
Binary files /dev/null and b/fonts/charis/CharisSIL-Cyrillic-Regular.woff2 differ
diff --git a/subset-fonts.ps1 b/subset-fonts.ps1
index 50a7b62ba..7f4185a59 100755
--- a/subset-fonts.ps1
+++ b/subset-fonts.ps1
@@ -10,12 +10,17 @@ $fontFamily = "Charis SIL";
 $subsets = [ordered]@{
     "Latin" = @{
         "Features" = "c2sc,smcp,subs,sups"
+        "Display" = "block"
         "Blocks" = @("BasicLatin", "GeneralPunctuation", "Latin1Supplement")
     }
     # Don't need smcp/c2sc for these
     "LatinExt" = @{
         "Blocks" = @("LatinExtendedA", "CombiningDiacriticalMarks")
     }
+    # Cyrillic
+    "Cyrillic" = @{
+        "Blocks" = @("Cyrillic")
+    }
     # Chinese (Pinyin & Jyutping) transliteration
     "ChineseTranslit" = @{
         "Blocks" = @( "LatinExtendedB", "SuperscriptsandSubscripts")
@@ -64,6 +69,11 @@ foreach ($subset in $subsets.GetEnumerator()) {
         echo "@font-face {" >> $css
         echo "    font-family: '$fontFamily';" >> $css
         echo "    src: local('$fontFamily'), url('/fonts/charis/$(Split-Path -Leaf $targetFile)') format('woff2');" >> $css
+        if ($subset.Value.ContainsKey("Display")) {
+            echo "    font-display: $($subset.Value.Display);" >> $css
+        } else {
+            echo "    font-display: swap;" >> $css
+        }
         if ($file.Name -like "*Italic*") {
             echo "    font-style: italic;" >> $css
         }