diff --git a/packages/console/package.json b/packages/console/package.json
index 85b58aed1..1b816c659 100644
--- a/packages/console/package.json
+++ b/packages/console/package.json
@@ -18,11 +18,11 @@
   },
   "devDependencies": {
     "@fontsource/roboto-mono": "^4.5.7",
+    "@logto/core-kit": "^1.0.0-beta.13",
     "@logto/phrases": "^1.0.0-beta.9",
     "@logto/phrases-ui": "^1.0.0-beta.9",
     "@logto/react": "1.0.0-beta.8",
     "@logto/schemas": "^1.0.0-beta.9",
-    "@logto/core-kit": "^1.0.0-beta.13",
     "@mdx-js/react": "^1.6.22",
     "@parcel/core": "2.7.0",
     "@parcel/transformer-mdx": "2.7.0",
@@ -43,6 +43,7 @@
     "@types/react-modal": "^3.13.1",
     "@types/react-syntax-highlighter": "^15.5.1",
     "classnames": "^2.3.1",
+    "clean-deep": "^3.4.0",
     "cross-env": "^7.0.3",
     "csstype": "^3.0.11",
     "dayjs": "^1.10.5",
diff --git a/packages/console/src/pages/SignInExperience/components/ManageLanguageModal/LanguageEditor.tsx b/packages/console/src/pages/SignInExperience/components/ManageLanguageModal/LanguageEditor.tsx
index 6a56b545c..e36d8ce48 100644
--- a/packages/console/src/pages/SignInExperience/components/ManageLanguageModal/LanguageEditor.tsx
+++ b/packages/console/src/pages/SignInExperience/components/ManageLanguageModal/LanguageEditor.tsx
@@ -3,6 +3,7 @@ import resource, {
   languageCodeAndDisplayNameMappings,
   Translation as UiTranslation,
 } from '@logto/phrases-ui';
+import cleanDeep from 'clean-deep';
 import { useEffect, useMemo } from 'react';
 import { FormProvider, useForm } from 'react-hook-form';
 import { toast } from 'react-hot-toast';
@@ -65,7 +66,7 @@ const LanguageEditor = ({ selectedLanguageKey, onFormStateChange }: LanguageEdit
     const updatedCustomPhrase = await api
       .put(`/api/custom-phrases/${selectedLanguageKey}`, {
         json: {
-          ...formData,
+          ...cleanDeep(formData),
         },
       })
       .json<CustomPhraseResponse>();
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 234cbcfc2..5b8a7ea8c 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -46,6 +46,7 @@ importers:
       '@types/react-modal': ^3.13.1
       '@types/react-syntax-highlighter': ^15.5.1
       classnames: ^2.3.1
+      clean-deep: ^3.4.0
       cross-env: ^7.0.3
       csstype: ^3.0.11
       dayjs: ^1.10.5
@@ -110,6 +111,7 @@ importers:
       '@types/react-modal': 3.13.1
       '@types/react-syntax-highlighter': 15.5.1
       classnames: 2.3.1
+      clean-deep: 3.4.0
       cross-env: 7.0.3
       csstype: 3.0.11
       dayjs: 1.10.7
@@ -5570,6 +5572,15 @@ packages:
     resolution: {integrity: sha512-OlQdbZ7gLfGarSqxesMesDa5uz7KFbID8Kpq/SxIoNGDqY8lSYs0D+hhtBXhcdB3rcbXArFr7vlHheLk1voeNA==}
     dev: true
 
+  /clean-deep/3.4.0:
+    resolution: {integrity: sha512-Lo78NV5ItJL/jl+B5w0BycAisaieJGXK1qYi/9m4SjR8zbqmrUtO7Yhro40wEShGmmxs/aJLI/A+jNhdkXK8mw==}
+    engines: {node: '>=4'}
+    dependencies:
+      lodash.isempty: 4.4.0
+      lodash.isplainobject: 4.0.6
+      lodash.transform: 4.6.0
+    dev: true
+
   /clean-regexp/1.0.0:
     resolution: {integrity: sha512-GfisEZEJvzKrmGWkvfhgzcz/BllN1USeqD2V6tg14OAOgaCD2Z/PUEuxnAZ/nPvmaHRG7a8y77p1T/IRQ4D1Hw==}
     engines: {node: '>=4'}
@@ -10212,10 +10223,18 @@ packages:
     resolution: {integrity: sha512-z+Uw/vLuy6gQe8cfaFWD7p0wVv8fJl3mbzXh33RS+0oW2wvUqiRXiQ69gLWSLpgB5/6sU+r6BlQR0MBILadqTQ==}
     dev: true
 
+  /lodash.isempty/4.4.0:
+    resolution: {integrity: sha512-oKMuF3xEeqDltrGMfDxAPGIVMSSRv8tbRSODbrs4KGsRRLEhrW8N8Rd4DRgB2+621hY8A8XwwrTVhXWpxFvMzg==}
+    dev: true
+
   /lodash.ismatch/4.4.0:
     resolution: {integrity: sha1-dWy1FQyjum8RCFp4hJZF8Yj4Xzc=}
     dev: true
 
+  /lodash.isplainobject/4.0.6:
+    resolution: {integrity: sha512-oSXzaWypCMHkPC3NvBEaPHf0KsA5mvPrOPgQWDsbg8n7orZ290M0BmC/jgRZ4vcJ6DTAhjrsSYgdsW/F+MFOBA==}
+    dev: true
+
   /lodash.kebabcase/4.1.1:
     resolution: {integrity: sha1-hImxyw0p/4gZXM7KRI/21swpXDY=}
     dev: true
@@ -10258,6 +10277,10 @@ packages:
       lodash._reinterpolate: 3.0.0
     dev: true
 
+  /lodash.transform/4.6.0:
+    resolution: {integrity: sha512-LO37ZnhmBVx0GvOU/caQuipEh4GN82TcWv3yHlebGDgOxbxiwwzW5Pcx2AcvpIv2WmvmSMoC492yQFNhy/l/UQ==}
+    dev: true
+
   /lodash.truncate/4.4.2:
     resolution: {integrity: sha512-jttmRe7bRse52OsWIMDLaXxWqRAmtIUccAQ3garviCqJjafXOfNMO0yMfNpdD6zbGaTU0P5Nz7e7gAT6cKmJRw==}
     dev: true