diff --git a/.forgejo/workflows/tag-release.yml b/.forgejo/workflows/tag-release.yml
index 224bfb0..91b476b 100644
--- a/.forgejo/workflows/tag-release.yml
+++ b/.forgejo/workflows/tag-release.yml
@@ -19,6 +19,7 @@ on:
           - cache
           - checkout
           - helm-deploy
+          - i18n-sync
           - inject-content
           - maven-build
           - pnpm-build
diff --git a/README.md b/README.md
index 07aa3e3..079207e 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,7 @@ Shared actions for Forgejo CI/CD pipelines.
 | [cache](cache) | Cache files between workflow runs |
 | [checkout](checkout) | Action for checking out a repository |
 | [helm-deploy](helm-deploy) | Deploy a service to Kubernetes via Helm over SSH |
+| [i18n-sync](i18n-sync) | Fetch translations from i18n.schmalz.com and open a pull request |
 | [inject-content](inject-content) | Inject content into a file by appending or overwriting |
 | [maven-build](maven-build) | Action for building and validating Maven projects |
 | [pnpm-build](pnpm-build) | Action for building and validating with PNPM |
diff --git a/i18n-sync/README.md b/i18n-sync/README.md
new file mode 100644
index 0000000..5adeee7
--- /dev/null
+++ b/i18n-sync/README.md
@@ -0,0 +1,46 @@
+# i18n-sync
+
+Fetches the latest translations from i18n.schmalz.com, commits them to a `chore/i18n` branch, and opens a pull request against the destination branch.
+
+## Inputs
+
+| Input | Required | Default | Description |
+|-------|----------|---------|-------------|
+| `i18n-application` | Yes | — | Application key in i18n.schmalz.com (e.g. `calculator`) |
+| `locales-folder` | No | `locales` | Path to the locales directory relative to the repository root |
+| `format-folder` | No | `""` | Directory containing the `package.json` whose format script should be run after downloading translations. Leave empty to skip formatting. |
+| `format-script` | No | `format` | pnpm script name to run for formatting (e.g. `format`, `format:fix`) |
+| `jfrog-token` | No | `""` | JFrog npm auth token (required when `format-folder` is set) |
+| `forgejo-token` | Yes | — | Forgejo token with `contents:write` and `pull-requests:write` access |
+| `destination-branch` | No | `dev` | Target branch for the pull request |
+
+## Usage
+
+Minimal — no formatting:
+
+```yaml
+- uses: https://schmalz-git.git.onstackit.cloud/schmalz/shared-actions/i18n-sync@i18n-sync-v1
+  with:
+    i18n-application: my-app
+    forgejo-token: ${{ secrets.FORGEJO_I18N_UPDATE_TOKEN }}
+```
+
+With formatting after download:
+
+```yaml
+- uses: https://schmalz-git.git.onstackit.cloud/schmalz/shared-actions/i18n-sync@i18n-sync-v1
+  with:
+    i18n-application: my-app
+    locales-folder: frontend/locales
+    format-folder: frontend
+    jfrog-token: ${{ secrets.JFROG_TOKEN }}
+    forgejo-token: ${{ secrets.FORGEJO_I18N_UPDATE_TOKEN }}
+```
+
+## Notes
+
+- The action fails fast if the `chore/i18n` branch already exists, indicating a previous update is still pending review.
+- If no translation changes are detected after downloading, the action exits cleanly without creating a branch or PR.
+- Deleted languages (files removed from i18n.schmalz.com) are also staged for removal via `git add --all`.
+- `jq` is installed automatically if not present on the runner.
+- The `forgejo-token` must belong to a user or bot with `contents:write` and `pull-requests:write` permissions on the repository.
diff --git a/i18n-sync/action.yml b/i18n-sync/action.yml
new file mode 100644
index 0000000..ac28fd4
--- /dev/null
+++ b/i18n-sync/action.yml
@@ -0,0 +1,131 @@
+name: i18n Sync
+description: >
+  Fetches the latest translations from i18n.schmalz.com, commits them to a
+  chore/i18n branch, and opens a pull request against the destination branch.
+
+inputs:
+  i18n-application:
+    description: Application key in i18n.schmalz.com (e.g. "calculator")
+    required: true
+  locales-folder:
+    description: Path to the locales directory relative to the repository root
+    required: false
+    default: locales
+  format-folder:
+    description: >
+      Directory containing the package.json whose format script should be run
+      after downloading translations. Leave empty to skip formatting.
+    required: false
+    default: ""
+  format-script:
+    description: pnpm script name to run for formatting (e.g. "format", "format:fix")
+    required: false
+    default: format
+  jfrog-token:
+    description: JFrog npm auth token (required when format-folder is set)
+    required: false
+    default: ""
+  forgejo-token:
+    description: Forgejo token with contents:write and pull-requests:write access
+    required: true
+  destination-branch:
+    description: Target branch for the pull request
+    required: false
+    default: dev
+
+runs:
+  using: composite
+  steps:
+    - name: Install jq if missing
+      shell: bash
+      run: |
+        set -euo pipefail
+        command -v jq >/dev/null 2>&1 || sudo apt-get install -y --no-install-recommends jq
+
+    - name: Configure git
+      shell: bash
+      env:
+        FORGEJO_TOKEN: ${{ inputs.forgejo-token }}
+      run: |
+        set -euo pipefail
+        git config user.name "github-actions[bot]"
+        git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+
+        ORIGIN_URL=$(git remote get-url origin)
+        CLEAN_URL=$(echo "$ORIGIN_URL" | sed 's|https://[^@]*@|https://|')
+        git remote set-url origin "$(echo "$CLEAN_URL" | sed "s|https://|https://github-actions[bot]:${FORGEJO_TOKEN}@|")"
+
+    - name: Check if i18n branch already exists
+      shell: bash
+      run: |
+        set -euo pipefail
+        if git ls-remote --exit-code --heads origin "refs/heads/chore/i18n" >/dev/null 2>&1; then
+          echo "Branch chore/i18n already exists. A previous i18n update is still pending."
+          exit 1
+        fi
+
+    - name: Download translations
+      shell: bash
+      env:
+        I18N_APPLICATION: ${{ inputs.i18n-application }}
+        LOCALES_FOLDER: ${{ inputs.locales-folder }}
+      run: |
+        set -euo pipefail
+        git checkout -b chore/i18n
+
+        echo "Fetching available languages for application: $I18N_APPLICATION"
+        languages_json=$(curl --fail-with-body -sSL "https://i18n.schmalz.com/api/languages?projectKey=$I18N_APPLICATION")
+
+        echo "$languages_json" | jq -r '.[]' | while read -r lang; do
+          echo "Downloading language: $lang"
+          curl --fail-with-body -sSL -o "${LOCALES_FOLDER}/${lang}.json" \
+            "https://i18n.schmalz.com/api/${I18N_APPLICATION}/${lang}.json"
+        done
+
+    - name: Format translations
+      if: ${{ inputs.format-folder != '' }}
+      uses: https://schmalz-git.git.onstackit.cloud/schmalz/shared-actions/pnpm-build@pnpm-build-v1
+      with:
+        working-directory: ${{ inputs.format-folder }}
+        jfrog-token: ${{ inputs.jfrog-token }}
+        run-scripts: ${{ inputs.format-script }}
+        check-dedupe: "false"
+
+    - name: Commit and push translations
+      id: commit
+      shell: bash
+      env:
+        LOCALES_FOLDER: ${{ inputs.locales-folder }}
+      run: |
+        set -euo pipefail
+        git add --all "${LOCALES_FOLDER}/"
+
+        if git diff-index --cached --quiet HEAD; then
+          echo "No translation changes detected. Nothing to do."
+          echo "has_changes=false" >> "$GITHUB_OUTPUT"
+          exit 0
+        fi
+
+        git commit -m "chore: update translations via i18n"
+        git push origin chore/i18n
+        echo "has_changes=true" >> "$GITHUB_OUTPUT"
+
+    - name: Create pull request
+      if: ${{ steps.commit.outputs.has_changes == 'true' }}
+      shell: bash
+      env:
+        TOKEN: ${{ inputs.forgejo-token }}
+        DESTINATION_BRANCH: ${{ inputs.destination-branch }}
+      run: |
+        set -euo pipefail
+        curl --fail-with-body -s -X POST \
+          -H "Authorization: token ${TOKEN}" \
+          -H "Content-Type: application/json" \
+          "${GITHUB_SERVER_URL}/api/v1/repos/${GITHUB_REPOSITORY}/pulls" \
+          -d "$(jq -n \
+            --arg title "chore: update translations via i18n" \
+            --arg head "chore/i18n" \
+            --arg base "$DESTINATION_BRANCH" \
+            --arg body "Automated translation update from i18n.schmalz.com" \
+            '{title: $title, head: $head, base: $base, body: $body, delete_branch_after_merge: true}'
+          )"