Add untranslated entry detection, auto version from tags, MIT license

- Untranslated check flags missing translations (skips source language)
- Source language auto-detected: exactly 1 locale with all entries untranslated
- hatch-vcs derives version from git tags (no manual bumping)
- Switch license from Apache 2.0 to MIT
- --check-untranslated / --no-check-untranslated CLI flag

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Niels Ekkelenkamp

.github/workflows/ci.yml

@@ -15,6 +15,8 @@ jobs:
         python-version: ["3.10", "3.11", "3.12"]
     steps:
       - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
       - uses: astral-sh/setup-uv@v4
         with:
           version: "latest"
@@ -37,6 +39,8 @@ jobs:
       id-token: write
     steps:
       - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
       - uses: astral-sh/setup-uv@v4
         with:
           version: "latest"

.gitignore

@@ -8,3 +8,4 @@ build/
 .pytest_cache/
 *.bin
 *.ftz
+src/po_lint/_version.py

LICENSE

@@ -1,201 +1,21 @@
-                                 Apache License
-                           Version 2.0, January 2004
-                        http://www.apache.org/licenses/
-
-   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-
-   1. Definitions.
-
-      "License" shall mean the terms and conditions for use, reproduction,
-      and distribution as defined by Sections 1 through 9 of this document.
-
-      "Licensor" shall mean the copyright owner or entity authorized by
-      the copyright owner that is granting the License.
-
-      "Legal Entity" shall mean the union of the acting entity and all
-      other entities that control, are controlled by, or are under common
-      control with that entity. For the purposes of this definition,
-      "control" means (i) the power, direct or indirect, to cause the
-      direction or management of such entity, whether by contract or
-      otherwise, or (ii) ownership of fifty percent (50%) or more of the
-      outstanding shares, or (iii) beneficial ownership of such entity.
-
-      "You" (or "Your") shall mean an individual or Legal Entity
-      exercising permissions granted by this License.
-
-      "Source" form shall mean the preferred form for making modifications,
-      including but not limited to software source code, documentation
-      source, and configuration files.
-
-      "Object" form shall mean any form resulting from mechanical
-      transformation or translation of a Source form, including but
-      not limited to compiled object code, generated documentation,
-      and conversions to other media types.
-
-      "Work" shall mean the work of authorship, whether in Source or
-      Object form, made available under the License, as indicated by a
-      copyright notice that is included in or attached to the work
-      (an example is provided in the Appendix below).
-
-      "Derivative Works" shall mean any work, whether in Source or Object
-      form, that is based on (or derived from) the Work and for which the
-      editorial revisions, annotations, elaborations, or other modifications
-      represent, as a whole, an original work of authorship. For the purposes
-      of this License, Derivative Works shall not include works that remain
-      separable from, or merely link (or bind by name) to the interfaces of,
-      the Work and Derivative Works thereof.
-
-      "Contribution" shall mean any work of authorship, including
-      the original version of the Work and any modifications or additions
-      to that Work or Derivative Works thereof, that is intentionally
-      submitted to Licensor for inclusion in the Work by the copyright owner
-      or by an individual or Legal Entity authorized to submit on behalf of
-      the copyright owner. For the purposes of this definition, "submitted"
-      means any form of electronic, verbal, or written communication sent
-      to the Licensor or its representatives, including but not limited to
-      communication on electronic mailing lists, source code control systems,
-      and issue tracking systems that are managed by, or on behalf of, the
-      Licensor for the purpose of discussing and improving the Work, but
-      excluding communication that is conspicuously marked or otherwise
-      designated in writing by the copyright owner as "Not a Contribution."
-
-      "Contributor" shall mean Licensor and any individual or Legal Entity
-      on behalf of whom a Contribution has been received by Licensor and
-      subsequently incorporated within the Work.
-
-   2. Grant of Copyright License. Subject to the terms and conditions of
-      this License, each Contributor hereby grants to You a perpetual,
-      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
-      copyright license to reproduce, prepare Derivative Works of,
-      publicly display, publicly perform, sublicense, and distribute the
-      Work and such Derivative Works in Source or Object form.
-
-   3. Grant of Patent License. Subject to the terms and conditions of
-      this License, each Contributor hereby grants to You a perpetual,
-      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
-      (except as stated in this section) patent license to make, have made,
-      use, offer to sell, sell, import, and otherwise transfer the Work,
-      where such license applies only to those patent claims licensable
-      by such Contributor that are necessarily infringed by their
-      Contribution(s) alone or by combination of their Contribution(s)
-      with the Work to which such Contribution(s) was submitted. If You
-      institute patent litigation against any entity (including a
-      cross-claim or counterclaim in a lawsuit) alleging that the Work
-      or a Contribution incorporated within the Work constitutes direct
-      or contributory patent infringement, then any patent licenses
-      granted to You under this License for that Work shall terminate
-      as of the date such litigation is filed.
-
-   4. Redistribution. You may reproduce and distribute copies of the
-      Work or Derivative Works thereof in any medium, with or without
-      modifications, and in Source or Object form, provided that You
-      meet the following conditions:
-
-      (a) You must give any other recipients of the Work or
-          Derivative Works a copy of this License; and
-
-      (b) You must cause any modified files to carry prominent notices
-          stating that You changed the files; and
-
-      (c) You must retain, in the Source form of any Derivative Works
-          that You distribute, all copyright, patent, trademark, and
-          attribution notices from the Source form of the Work,
-          excluding those notices that do not pertain to any part of
-          the Derivative Works; and
-
-      (d) If the Work includes a "NOTICE" text file as part of its
-          distribution, then any Derivative Works that You distribute must
-          include a readable copy of the attribution notices contained
-          within such NOTICE file, excluding those notices that do not
-          pertain to any part of the Derivative Works, in at least one
-          of the following places: within a NOTICE text file distributed
-          as part of the Derivative Works; within the Source form or
-          documentation, if provided along with the Derivative Works; or,
-          within a display generated by the Derivative Works, if and
-          wherever such third-party notices normally appear. The contents
-          of the NOTICE file are for informational purposes only and
-          do not modify the License. You may add Your own attribution
-          notices within Derivative Works that You distribute, alongside
-          or as an addendum to the NOTICE text from the Work, provided
-          that such additional attribution notices cannot be construed
-          as modifying the License.
-
-      You may add Your own copyright statement to Your modifications and
-      may provide additional or different license terms and conditions
-      for use, reproduction, or distribution of Your modifications, or
-      for any such Derivative Works as a whole, provided Your use,
-      reproduction, and distribution of the Work otherwise complies with
-      the conditions stated in this License.
-
-   5. Submission of Contributions. Unless You explicitly state otherwise,
-      any Contribution intentionally submitted for inclusion in the Work
-      by You to the Licensor shall be under the terms and conditions of
-      this License, without any additional terms or conditions.
-      Notwithstanding the above, nothing herein shall supersede or modify
-      the terms of any separate license agreement you may have executed
-      with Licensor regarding such Contributions.
-
-   6. Trademarks. This License does not grant permission to use the trade
-      names, trademarks, service marks, or product names of the Licensor,
-      except as required for reasonable and customary use in describing the
-      origin of the Work and reproducing the content of the NOTICE file.
-
-   7. Disclaimer of Warranty. Unless required by applicable law or
-      agreed to in writing, Licensor provides the Work (and each
-      Contributor provides its Contributions) on an "AS IS" BASIS,
-      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
-      implied, including, without limitation, any warranties or conditions
-      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
-      PARTICULAR PURPOSE. You are solely responsible for determining the
-      appropriateness of using or redistributing the Work and assume any
-      risks associated with Your exercise of permissions under this License.
-
-   8. Limitation of Liability. In no event and under no legal theory,
-      whether in tort (including negligence), contract, or otherwise,
-      unless required by applicable law (such as deliberate and grossly
-      negligent acts) or agreed to in writing, shall any Contributor be
-      liable to You for damages, including any direct, indirect, special,
-      incidental, or consequential damages of any character arising as a
-      result of this License or out of the use or inability to use the
-      Work (including but not limited to damages for loss of goodwill,
-      work stoppage, computer failure or malfunction, or any and all
-      other commercial damages or losses), even if such Contributor
-      has been advised of the possibility of such damages.
-
-   9. Accepting Warranty or Additional Liability. While redistributing
-      the Work or Derivative Works thereof, You may choose to offer,
-      and charge a fee for, acceptance of support, warranty, indemnity,
-      or other liability obligations and/or rights consistent with this
-      License. However, in accepting such obligations, You may act only
-      on Your own behalf and on Your sole responsibility, not on behalf
-      of any other Contributor, and only if You agree to indemnify,
-      defend, and hold each Contributor harmless for any liability
-      incurred by, or claims asserted against, such Contributor by reason
-      of your accepting any such warranty or additional liability.
-
-   END OF TERMS AND CONDITIONS
-
-   APPENDIX: How to apply the Apache License to your work.
-
-      To apply the Apache License to your work, attach the following
-      boilerplate notice, with the fields enclosed by brackets "[]"
-      replaced with your own identifying information. (Don't include
-      the brackets!)  The text should be enclosed in the appropriate
-      comment syntax for the file format. We also recommend that a
-      file or class name and description of purpose be included on the
-      same "printed page" as the copyright notice for easier
-      identification within third-party archives.
-
-   Copyright [yyyy] [name of copyright owner]
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
+MIT License
+
+Copyright (c) 2026 Pescheck
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -1,6 +1,6 @@
 # python-po-lint
 
-Lint `.po` translation files for contamination, wrong languages, shifts, and garbled text.
+Lint `.po` translation files for contamination, wrong languages, missing translations, shifts, and garbled text.
 
 Uses [fastText](https://fasttext.cc/) language identification with carrier phrase confirmation and confused language score merging for high accuracy with zero false positives.
 
@@ -9,6 +9,7 @@ Uses [fastText](https://fasttext.cc/) language identification with carrier phras
 - **Wrong language detection** — fastText-based with top-5 scoring, confused language merging, and carrier phrase confirmation
 - **Wrong script detection** — catches Cyrillic in a Dutch file, Arabic in French, Latin in Chinese, etc.
 - **Distinctive character detection** — catches Russian-specific chars in Ukrainian and vice versa
+- **Untranslated entry detection** — flags missing translations, auto-detects source language
 - **Shifted entry detection** — finds translations that got shifted to the wrong msgid
 - **Garbled text detection** — catches corrupted/broken unicode
 - **Ignore rules** — `.po-lint-ignore` file with language scoping and msgctxt support
@@ -53,6 +54,9 @@ po-lint locale/ --min-detection-length 25
 
 # Specify source language (default: en)
 po-lint locale/ --source-language en
+
+# Disable untranslated entry check
+po-lint locale/ --no-check-untranslated
 ```
 
 ## Configuration
@@ -85,6 +89,10 @@ min_text_length = 3
 # Use compact fastText model instead of full
 compact_model = false
 
+# Check for untranslated entries (default: true)
+# Source language is auto-detected or set via source_language
+check_untranslated = true
+
 # Regex patterns to ignore (matched against msgid and msgstr)
 ignore_patterns = []
 ```
@@ -112,8 +120,9 @@ screening status::Some msgid
 1. **Wrong script check** — fast, no model needed. Checks if the translation uses the expected writing system.
 2. **Distinctive character check** — detects cross-contamination between languages sharing a script (e.g. Russian/Ukrainian).
 3. **Garbled text check** — flags corrupted unicode.
-4. **Shifted entry check** — flags suspiciously short translations for long source strings.
-5. **Wrong language check** — uses fastText with three layers of false positive prevention:
+4. **Untranslated entry check** — flags entries with empty `msgstr`. The source language is auto-detected (the locale where all entries are untranslated) or can be set explicitly. Skipped for the source language.
+5. **Shifted entry check** — flags suspiciously short translations for long source strings.
+6. **Wrong language check** — uses fastText with three layers of false positive prevention:
    - **Confused language score merging** — redistributes scores from commonly confused languages (e.g. Danish/Norwegian, Portuguese/Spanish)
    - **Source language allowance** — borrowed words from the source language are common and allowed
    - **Carrier phrase confirmation** — re-tests with a language-specific phrase prepended to distinguish false positives from real contamination

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "python-po-lint"
-version = "0.1.1"
+dynamic = ["version"]
 description = "Lint .po translation files for contamination, wrong languages, shifts, and garbled text"
 readme = "README.md"
 license = "MIT"
@@ -18,9 +18,15 @@ dependencies = [
 po-lint = "po_lint.cli:main"
 
 [build-system]
-requires = ["hatchling"]
+requires = ["hatchling", "hatch-vcs"]
 build-backend = "hatchling.build"
 
+[tool.hatch.version]
+source = "vcs"
+
+[tool.hatch.build.hooks.vcs]
+version-file = "src/po_lint/_version.py"
+
 [tool.hatch.build.targets.wheel]
 packages = ["src/po_lint"]
 

src/po_lint/cli.py

@@ -51,6 +51,12 @@ def main(argv: list[str] | None = None) -> int:
         default=None,
         help="Minimum cleaned text length for language detection (default: 30).",
     )
+    parser.add_argument(
+        "--check-untranslated",
+        action=argparse.BooleanOptionalAction,
+        default=None,
+        help="Check for untranslated entries (default: true). Use --no-check-untranslated to disable.",
+    )
     parser.add_argument(
         "--compact-model",
         action="store_true",
@@ -86,6 +92,10 @@ def main(argv: list[str] | None = None) -> int:
         args.min_detection_length if args.min_detection_length is not None
         else config.min_detection_length
     )
+    check_untranslated = (
+        args.check_untranslated if args.check_untranslated is not None
+        else config.check_untranslated
+    )
 
     # Resolve locale directories
     if args.paths:
@@ -117,6 +127,7 @@ def main(argv: list[str] | None = None) -> int:
             min_text_length=config.min_text_length,
             min_detection_length=min_detection_length,
             ignore_patterns=config.ignore_patterns,
+            check_untranslated=check_untranslated,
         )
         all_issues.extend(issues)
 

src/po_lint/config.py

@@ -27,6 +27,7 @@ class Config:
     min_detection_length: int = 30
     ignore_patterns: list[str] = field(default_factory=list)
     compact_model: bool = False
+    check_untranslated: bool = True
 
     def resolve_locale_dirs(self, base_dir: Path) -> list[Path]:
         """Resolve all locale directories from paths and packages.
@@ -91,4 +92,5 @@ def load_config(project_dir: Path | None = None) -> Config:
         min_detection_length=tool_config.get("min_detection_length", 30),
         ignore_patterns=tool_config.get("ignore_patterns", []),
         compact_model=tool_config.get("compact_model", False),
+        check_untranslated=tool_config.get("check_untranslated", True),
     )