ci(core): add a workflow to generate translation context

diff --git a/.github/workflows/crowdin-ui-check.yml b/.github/workflows/crowdin-ui-check.yml
new file mode 100644
index 00000000..77f74834
--- /dev/null
+++ b/.github/workflows/crowdin-ui-check.yml
@@ -0,0 +1,117 @@
+name: Crowdin - context generation (manual)
+run-name: Crowdin - <${{ inputs.language }}> language context generation
+
+on:
+  workflow_dispatch:
+    inputs:
+      language:
+        description: Select a language to generate UI flows for
+        required: true
+        type: choice
+        default: cs
+        options:
+          - cs
+          - fr
+          - de
+          - es
+          - pt
+
+permissions:
+  id-token: write  # for fetching OIDC token for AWS
+
+env:
+  CROWDIN_COMMENT_PATH: ${{ github.workspace }}/tests/core-crowdin-comment.md
+  TREZOR_PYTEST_LOGS_DIR: ${{ github.workspace }}/tests/
+
+jobs:
+  core_emu:
+    name: Build emulator (${{ matrix.model }}, universal, debuglink, noasan)
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        model: [T2T1, T3B1, T3T1, T3W1]
+    env:
+      TREZOR_MODEL: ${{ matrix.model }}
+      BITCOIN_ONLY: 0
+      PYOPT: 0
+      ADDRESS_SANITIZER: 0
+      QUIET_MODE: 1
+      DISABLE_TROPIC: 0
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          submodules: recursive
+      - uses: ./.github/actions/environment
+      - run: nix-shell --run "uv run make -C core build_unix_frozen"
+      - uses: actions/upload-artifact@v6
+        with:
+          name: core-emu-${{ matrix.model }}-universal-debuglink-noasan
+          path: |
+            core/build/unix/trezor-emu-core*
+          retention-days: 7
+
+  # Context tests for Core. Generates screenshots of UI flows of curated list of tests
+  # for selected language. To be used as context for Crowdin localization work.
+  core_context_tests:
+    name: Context tests (${{ matrix.model }}, universal, noasan, ${{ matrix.language }})
+    runs-on: ubuntu-latest
+    needs: core_emu
+    strategy:
+      fail-fast: false
+      matrix:
+        model: [T2T1, T3B1, T3T1, T3W1]
+        language: ["en", "${{ inputs.language }}"]
+
+    env:
+      TREZOR_PROFILING: 0
+      TREZOR_MODEL: ${{ matrix.model }}
+      ADDRESS_SANITIZER: 0
+      PYTEST_TIMEOUT: 400
+      TEST_LANG: ${{ matrix.language }}
+      TESTOPTS: "@../tests/context_tests.txt --ui=test"
+
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          submodules: recursive
+      - uses: actions/download-artifact@v7
+        with:
+          name: core-emu-${{ matrix.model }}-universal-debuglink-noasan
+          path: core/build/unix
+      - run: chmod +x core/build/unix/trezor-emu-core*
+      - uses: ./.github/actions/environment
+      - run: nix-shell --run "uv run make -C core test_emu_multicore"
+      - run: tail -v -n50 tests/trezor*.log || true
+        if: failure()
+      - uses: ./.github/actions/ui-report
+        with:
+          model: ${{ matrix.model }}
+          lang: ${{ matrix.language }}
+          status: ${{ job.status }}
+        if: always()
+        continue-on-error: true
+
+  core_ui_comment:
+    name: Comment with UI flows
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - run: sleep 1m  # to avoid GitHub API rate limit
+      - run: |
+          python ci/make_crowdin_comment.py "${{ github.run_id }}" '["en", "${{ inputs.language }}"]' > ${{ env.CROWDIN_COMMENT_PATH }}
+          cat ${{ env.CROWDIN_COMMENT_PATH }} >> $GITHUB_STEP_SUMMARY
+      - name: Configure AWS credentials
+        uses: aws-actions/configure-aws-credentials@v4
+        with:
+          role-to-assume: arn:aws:iam::538326561891:role/gh_actions_deploy_dev_firmware_data
+          aws-region: eu-west-1
+      - run: python ci/make_summary_htmls.py "index" '["en", "${{ inputs.language }}"]' "tests/ui_tests/reporting/"
+      - run: python ci/make_summary_htmls.py "diff" '["en", "${{ inputs.language }}"]' "tests/ui_tests/reporting/"
+      - name: Upload per-language HTML summaries to S3
+        run: |
+          cd tests/ui_tests/reporting/
+          for F in *.html
+          do
+            aws s3 cp $F s3://data.trezor.io/dev/firmware/ui_report/${{ github.run_id }}/$F
+          done
diff --git a/ci/make_crowdin_comment.py b/ci/make_crowdin_comment.py
new file mode 100644
index 00000000..6b0dcaf8
--- /dev/null
+++ b/ci/make_crowdin_comment.py
@@ -0,0 +1,60 @@
+import json
+import sys
+
+(RUN_ID, LANGS_JSON) = sys.argv[1:]
+MAIN = json.loads(LANGS_JSON)
+
+REPORT_URL = f"https://data.trezor.io/dev/firmware/ui_report/{RUN_ID}"
+CI_RUN_URL = f"https://github.com/trezor/trezor-firmware/actions/runs/{RUN_ID}"
+MODELS_INFO = [
+    {"id": "T2T1", "name": "Trezor Model T", "layout": "Bolt"},
+    {"id": "T3B1", "name": "Trezor Safe 3", "layout": "Caesar"},
+    {"id": "T3T1", "name": "Trezor Safe 5", "layout": "Delizia"},
+    {"id": "T3W1", "name": "Trezor Safe 7", "layout": "Eckhart"},
+]
+LANG_NAMES = {
+    "cs": "Czech",
+    "de": "German",
+    "en": "English",
+    "es": "Spanish",
+    "fr": "French",
+    "pt": "Portuguese",
+}
+
+
+def display_lang(code: str) -> str:
+    return LANG_NAMES.get(code, code)  # fallback to the code if unknown
+
+
+def main():
+    # a special marker for finding this comment (via CI)
+    print("<!-- ui-comment-Crowdin -->")
+    for lang in MAIN:
+        print_table(lang)
+
+
+def format_table_row(cells: list[str]) -> str:
+    """Format a list of cells as a markdown table row with proper delimiters."""
+    return "| " + " | ".join(cells) + " |"
+
+
+def print_table(lang):
+    print(f"\n# `{display_lang(lang)}`\n")
+
+    header = ["layout", "context tests"]
+
+    print(format_table_row(header))
+    print(format_table_row(["---"] * len(header)))
+
+    for model in MODELS_INFO:
+        test_prefix = f"{REPORT_URL}/{model['id']}-{lang}-core_context_tests"
+        row = [
+            f"{model['layout']} / {model['name']}",
+            f"[UI flows]({test_prefix}-index.html)",
+        ]
+
+        print(format_table_row(row))
+
+
+if __name__ == "__main__":
+    main()
diff --git a/tests/context_tests.txt b/tests/context_tests.txt
new file mode 100644
index 00000000..4e6eaea4
--- /dev/null
+++ b/tests/context_tests.txt
@@ -0,0 +1,2 @@
+../tests/device_tests/test_pin.py::test_correct_pin
+../tests/click_tests/test_pin.py::test_pin_short
diff --git a/tests/ui_tests/reporting/create-gif.js b/tests/ui_tests/reporting/create-gif.js
index a7d91413..5153baac 100644
--- a/tests/ui_tests/reporting/create-gif.js
+++ b/tests/ui_tests/reporting/create-gif.js
@@ -2,8 +2,8 @@
 
 function createGif() {
     // Finds all the screenshots on the screen, creates a new img
-    // element at the top and switches the src attribute every 200ms
-    // to create a notion of GIF.
+    // element at the top and switches the src attribute periodically
+    // (interval based on defaultDelay) to create a notion of GIF.
     // Adds some controlling possibilities - buttons, input fields
     // and sliders to enable pausing, stepping back and forth, changing
     // the delay, etc.
@@ -28,7 +28,7 @@ function createGif() {
     const delayText = 'Delay (ms):';
     const sliderText = 'Progress:';
 
-    const defaultDelay = 200;
+    const defaultDelay = 1000;
 
     const keyboardShortcutPrev = 'ArrowLeft';
     const keyboardShortcutNext = 'ArrowRight';