DEVX-47: feat: add Polish as officially supported language

README.md

@@ -55,7 +55,7 @@ up by bumping their devx dependency.
 - **Developer tools** — environment setup, CI tool installation, test speed
   enforcement, repository configuration.
 - **i18n** — built-in translations for English, Bulgarian, German, Russian,
-  and Chinese; projects can extend with their own keys.
+  Chinese, and Polish; projects can extend with their own keys.
 
 ## Installation
 
@@ -324,7 +324,7 @@ The config system loads `.env` automatically via `python-dotenv`.
 | `DEVX_REPO_NAME` | **(none — must be set)** | Repository name (or `owner/repo`) |
 | `DEVX_TASK_PREFIX` | `DEVX` | Task ID prefix (GRM, OBL-INFRA, etc.) |
 | `DEVX_VIKUNJA_PROJECT_ID` | `6` | Vikunja project ID |
-| `DEVX_LANG` | `en` | Language for i18n (en, bg, de, ru, zh) |
+| `DEVX_LANG` | `en` | Language for i18n (en, bg, de, ru, zh, pl) |
 | `DEVX_TRANSLATIONS_PATH` | — | Path to a custom JSON translations file |
 | `DEVX_VERSION_FILE` | `src/devx/__init__.py` | Version source file (used by release) |
 | `DEVX_DOCS_DIR` | `docs` | Documentation directory (used by sync_wiki) |
@@ -431,7 +431,7 @@ src/devx/
 ├── i18n.py              # Translation system (gettext-based, translations.json)
 ├── exceptions.py        # Custom exception types (DevxError, APIError)
 ├── opentofu.py          # OpenTofu output helpers
-├── translations.json    # Translation strings (en, bg, de, ru, zh)
+├── translations.json    # Translation strings (en, bg, de, ru, zh, pl)
 ├── ci/                  # CI/CD automation modules (run by workflows)
 ├── tools/               # Developer tooling modules (run locally or by CI)
 └── molecule/            # Optional molecule testing helpers (for Ansible projects)