diff --git a/lib/schemas/privateThemeConfig.json b/lib/schemas/privateThemeConfig.json
index e7753571..8f42d0bb 100644
--- a/lib/schemas/privateThemeConfig.json
+++ b/lib/schemas/privateThemeConfig.json
@@ -155,6 +155,29 @@
                 },
                 "uniqueItems": true,
                 "minItems": 0
+              },
+              "translations": {
+                "type": "object",
+                "properties": {
+                  "i18n.description": {
+                    "type": "object",
+                    "properties": {
+                      "default": {
+                        "type": "string",
+                        "minLength": 1
+                      }
+                    },
+                    "patternProperties": {
+                      "[a-z]{2}(-[a-zA-Z0-9]{2,})?$": {
+                        "type": "string",
+                        "minLength": 1
+                      }
+                    },
+                    "additionalProperties": false,
+                    "required": ["default"]
+                  }
+                },
+                "additionalProperties": false
               }
             },
             "required": ["description"]
diff --git a/lib/schemas/themeConfig.json b/lib/schemas/themeConfig.json
index a05b915b..301c6399 100644
--- a/lib/schemas/themeConfig.json
+++ b/lib/schemas/themeConfig.json
@@ -191,6 +191,29 @@
                 },
                 "uniqueItems": true,
                 "minItems": 0
+              },
+              "translations": {
+                "type": "object",
+                "properties": {
+                  "i18n.description": {
+                    "type": "object",
+                    "properties": {
+                      "default": {
+                        "type": "string",
+                        "minLength": 1
+                      }
+                    },
+                    "patternProperties": {
+                      "[a-z]{2}(-[a-zA-Z0-9]{2,})?$": {
+                        "type": "string",
+                        "minLength": 1
+                      }
+                    },
+                    "additionalProperties": false,
+                    "required": ["default"]
+                  }
+                },
+                "additionalProperties": false
               }
             },
             "required": [