diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 509f13f..7cf01b4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -43,3 +43,11 @@ jobs:
         echo "::add-matcher::.github/actionlint-matcher.json"
         bash <(curl https://raw.githubusercontent.com/rhysd/actionlint/main/scripts/download-actionlint.bash)
         ./actionlint
+
+  reviewdog:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: errata-ai/vale-action@reviewdog
+      with:
+        fail_on_error: true
diff --git a/.vale.ini b/.vale.ini
new file mode 100644
index 0000000..7e8e41e
--- /dev/null
+++ b/.vale.ini
@@ -0,0 +1,5 @@
+StylesPath = .github/styles
+MinAlertLevel = suggestion
+
+[*.md]
+BasedOnStyles = Vale
diff --git a/README.md b/README.md
index 62f9a19..fa29954 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # dyndnsd.rb
 
+I can't english
+
 ![ci](https://github.com/cmur2/dyndnsd/workflows/ci/badge.svg) [![Dependencies](https://badges.depfu.com/badges/4f25da8493f7a29f652ac892fbf9227b/overview.svg)](https://depfu.com/github/cmur2/dyndnsd)
 
 A small, lightweight and extensible DynDNS server written with Ruby and Rack.