Auto translate strings

pyproject.toml

@@ -53,7 +53,6 @@ dependencies = [
   "ocrmypdf~=16.10.0",
   "pathvalidate~=3.3.1",
   "pdf2image~=1.17.0",
-  "psutil>=7",
   "psycopg-pool",
   "python-dateutil~=2.9.0",
   "python-dotenv~=1.1.0",

src/documents/classifier.py

@@ -4,7 +4,6 @@ import logging
 import pickle
 import re
 import warnings
-from functools import lru_cache
 from hashlib import sha256
 from pathlib import Path
 from typing import TYPE_CHECKING
@@ -51,7 +50,6 @@ class ClassifierModelCorruptError(Exception):
     pass
 
 
-@lru_cache(maxsize=1)
 def load_classifier(*, raise_exception: bool = False) -> DocumentClassifier | None:
     if not settings.MODEL_FILE.is_file():
         logger.debug(
@@ -63,11 +61,6 @@ def load_classifier(*, raise_exception: bool = False) -> DocumentClassifier | No
     classifier = DocumentClassifier()
     try:
         classifier.load()
-        logger.debug("classifier_id=%s", id(classifier))
-        logger.debug(
-            "classifier_data_vectorizer_hash=%s",
-            classifier.data_vectorizer_hash,
-        )
 
     except IncompatibleClassifierVersionError as e:
         logger.info(f"Classifier version incompatible: {e.message}, will re-train")
@@ -103,8 +96,7 @@ class DocumentClassifier:
     # v7 - Updated scikit-learn package version
     # v8 - Added storage path classifier
     # v9 - Changed from hashing to time/ids for re-train check
-    # v10 - Switch persistence to joblib with memory-mapping to reduce load-time memory spikes
+    FORMAT_VERSION = 9
-    FORMAT_VERSION = 10
 
     def __init__(self) -> None:
         # last time a document changed and therefore training might be required
@@ -136,49 +128,30 @@ class DocumentClassifier:
         ).hexdigest()
 
     def load(self) -> None:
-        import joblib
         from sklearn.exceptions import InconsistentVersionWarning
 
         # Catch warnings for processing
         with warnings.catch_warnings(record=True) as w:
-            try:
-                state = joblib.load(settings.MODEL_FILE, mmap_mode="r")
-            except Exception as err:
-                # As a fallback, try to detect old pickle-based and mark incompatible
-                try:
             with Path(settings.MODEL_FILE).open("rb") as f:
-                        _ = pickle.load(f)
+                schema_version = pickle.load(f)
-                    raise IncompatibleClassifierVersionError(
-                        "Cannot load classifier, incompatible versions.",
-                    ) from err
-                except IncompatibleClassifierVersionError:
-                    raise
-                except Exception:
-                    # Not even a readable pickle header
-                    raise ClassifierModelCorruptError from err
 
-            try:
+                if schema_version != self.FORMAT_VERSION:
-                if (
-                    not isinstance(state, dict)
-                    or state.get("format_version") != self.FORMAT_VERSION
-                ):
                     raise IncompatibleClassifierVersionError(
                         "Cannot load classifier, incompatible versions.",
                     )
+                else:
+                    try:
+                        self.last_doc_change_time = pickle.load(f)
+                        self.last_auto_type_hash = pickle.load(f)
 
-                self.last_doc_change_time = state.get("last_doc_change_time")
+                        self.data_vectorizer = pickle.load(f)
-                self.last_auto_type_hash = state.get("last_auto_type_hash")
-
-                self.data_vectorizer = state.get("data_vectorizer")
                         self._update_data_vectorizer_hash()
-                self.tags_binarizer = state.get("tags_binarizer")
+                        self.tags_binarizer = pickle.load(f)
 
-                self.tags_classifier = state.get("tags_classifier")
+                        self.tags_classifier = pickle.load(f)
-                self.correspondent_classifier = state.get("correspondent_classifier")
+                        self.correspondent_classifier = pickle.load(f)
-                self.document_type_classifier = state.get("document_type_classifier")
+                        self.document_type_classifier = pickle.load(f)
-                self.storage_path_classifier = state.get("storage_path_classifier")
+                        self.storage_path_classifier = pickle.load(f)
-            except IncompatibleClassifierVersionError:
-                raise
                     except Exception as err:
                         raise ClassifierModelCorruptError from err
 
@@ -198,24 +171,23 @@ class DocumentClassifier:
                     raise IncompatibleClassifierVersionError("sklearn version update")
 
     def save(self) -> None:
-        import joblib
-
         target_file: Path = settings.MODEL_FILE
-        target_file_temp: Path = target_file.with_suffix(".joblib.part")
+        target_file_temp: Path = target_file.with_suffix(".pickle.part")
 
-        state = {
+        with target_file_temp.open("wb") as f:
-            "format_version": self.FORMAT_VERSION,
+            pickle.dump(self.FORMAT_VERSION, f)
-            "last_doc_change_time": self.last_doc_change_time,
-            "last_auto_type_hash": self.last_auto_type_hash,
-            "data_vectorizer": self.data_vectorizer,
-            "tags_binarizer": self.tags_binarizer,
-            "tags_classifier": self.tags_classifier,
-            "correspondent_classifier": self.correspondent_classifier,
-            "document_type_classifier": self.document_type_classifier,
-            "storage_path_classifier": self.storage_path_classifier,
-        }
 
-        joblib.dump(state, target_file_temp, compress=3)
+            pickle.dump(self.last_doc_change_time, f)
+            pickle.dump(self.last_auto_type_hash, f)
+
+            pickle.dump(self.data_vectorizer, f)
+
+            pickle.dump(self.tags_binarizer, f)
+            pickle.dump(self.tags_classifier, f)
+
+            pickle.dump(self.correspondent_classifier, f)
+            pickle.dump(self.document_type_classifier, f)
+            pickle.dump(self.storage_path_classifier, f)
 
         target_file_temp.rename(target_file)
 

src/documents/parsers.py

@@ -19,6 +19,8 @@ from documents.loggers import LoggingMixin
 from documents.signals import document_consumer_declaration
 from documents.utils import copy_file_with_basic_stats
 from documents.utils import run_subprocess
+from paperless.config import OcrConfig
+from paperless.utils import ocr_to_dateparser_languages
 
 if TYPE_CHECKING:
     import datetime
@@ -272,6 +274,11 @@ def parse_date_generator(filename, text) -> Iterator[datetime.datetime]:
         """
         import dateparser
 
+        ocr_config = OcrConfig()
+        languages = settings.DATE_PARSER_LANGUAGES or ocr_to_dateparser_languages(
+            ocr_config.language,
+        )
+
         return dateparser.parse(
             ds,
             settings={
@@ -280,7 +287,7 @@ def parse_date_generator(filename, text) -> Iterator[datetime.datetime]:
                 "RETURN_AS_TIMEZONE_AWARE": True,
                 "TIMEZONE": settings.TIME_ZONE,
             },
-            locales=settings.DATE_PARSER_LANGUAGES,
+            locales=languages,
         )
 
     def __filter(date: datetime.datetime) -> datetime.datetime | None:

src/documents/tests/test_date_parsing.py

@@ -1,12 +1,14 @@
 import datetime
 from zoneinfo import ZoneInfo
 
+import pytest
 from pytest_django.fixtures import SettingsWrapper
 
 from documents.parsers import parse_date
 from documents.parsers import parse_date_generator
 
 
+@pytest.mark.django_db()
 class TestDate:
     def test_date_format_1(self):
         text = "lorem ipsum 130218 lorem ipsum"
@@ -49,7 +51,7 @@ class TestDate:
         settings: SettingsWrapper,
         settings_timezone: ZoneInfo,
     ):
-        settings.DATE_PARSER_LANGUAGES = []
+        settings.DATE_PARSER_LANGUAGES = ["de"]
         text = "lorem ipsum\nMärz 2019\nlorem ipsum"
         date = parse_date("", text)
         assert date == datetime.datetime(2019, 3, 1, 0, 0, tzinfo=settings_timezone)

src/documents/views.py

@@ -3,9 +3,7 @@ import logging
 import os
 import platform
 import re
-import resource
 import tempfile
-import time
 import zipfile
 from datetime import datetime
 from pathlib import Path
@@ -192,33 +190,6 @@ if settings.AUDIT_LOG_ENABLED:
 
 logger = logging.getLogger("paperless.api")
 
-try:
-    import psutil
-
-    _PS = psutil.Process(os.getpid())
-except Exception:
-    _PS = None
-
-_diag_log = logging.getLogger("paperless")
-
-
-def _mem_mb():
-    rss = _PS.memory_info().rss if _PS else 0
-    peak_kb = resource.getrusage(resource.RUSAGE_SELF).ru_maxrss
-    return rss / (1024 * 1024), peak_kb / 1024.0
-
-
-def _mark(phase, doc_id, t0):
-    rss, peak = _mem_mb()
-    _diag_log.debug(
-        "sugg doc=%s phase=%s rss=%.1fMB peak=%.1fMB t=%.1fms",
-        doc_id,
-        phase,
-        rss,
-        peak,
-        (time.perf_counter() - t0) * 1000,
-    )
-
 
 class IndexView(TemplateView):
     template_name = "index.html"
@@ -787,16 +758,7 @@ class DocumentViewSet(
         ),
     )
     def suggestions(self, request, pk=None):
-        t0 = time.perf_counter()
+        doc = get_object_or_404(Document.objects.select_related("owner"), pk=pk)
-        # Don't fetch content here
-        doc = get_object_or_404(
-            Document.objects.select_related("owner").only(
-                "id",
-                "owner_id",
-            ),
-            pk=pk,
-        )
-        _mark("start", doc.pk, t0)
         if request.user is not None and not has_perms_owner_aware(
             request.user,
             "view_document",
@@ -807,23 +769,18 @@ class DocumentViewSet(
         document_suggestions = get_suggestion_cache(doc.pk)
 
         if document_suggestions is not None:
-            _mark("cache_hit_return", doc.pk, t0)
             refresh_suggestions_cache(doc.pk)
             return Response(document_suggestions.suggestions)
 
         classifier = load_classifier()
-        _mark("loaded_classifier", doc.pk, t0)
 
         dates = []
         if settings.NUMBER_OF_SUGGESTED_DATES > 0:
             gen = parse_date_generator(doc.filename, doc.content)
-            _mark("before_dates", doc.pk, t0)
             dates = sorted(
                 {i for i in itertools.islice(gen, settings.NUMBER_OF_SUGGESTED_DATES)},
             )
-            _mark("after_dates", doc.pk, t0)
 
-        _mark("before_match", doc.pk, t0)
         resp_data = {
             "correspondents": [
                 c.id for c in match_correspondents(doc, classifier, request.user)
@@ -837,11 +794,9 @@ class DocumentViewSet(
             ],
             "dates": [date.strftime("%Y-%m-%d") for date in dates if date is not None],
         }
-        _mark("assembled_resp", doc.pk, t0)
 
         # Cache the suggestions and the classifier hash for later
         set_suggestions_cache(doc.pk, resp_data, classifier)
-        _mark("cached", doc.pk, t0)
 
         return Response(resp_data)
 

src/locale/en_US/LC_MESSAGES/django.po

@@ -2,7 +2,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: paperless-ngx\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2025-08-16 14:34+0000\n"
+"POT-Creation-Date: 2025-08-31 22:24+0000\n"
 "PO-Revision-Date: 2022-02-17 04:17\n"
 "Last-Translator: \n"
 "Language-Team: English\n"
@@ -1645,147 +1645,147 @@ msgstr ""
 msgid "paperless application settings"
 msgstr ""
 
-#: paperless/settings.py:774
+#: paperless/settings.py:772
 msgid "English (US)"
 msgstr ""
 
-#: paperless/settings.py:775
+#: paperless/settings.py:773
 msgid "Arabic"
 msgstr ""
 
-#: paperless/settings.py:776
+#: paperless/settings.py:774
 msgid "Afrikaans"
 msgstr ""
 
-#: paperless/settings.py:777
+#: paperless/settings.py:775
 msgid "Belarusian"
 msgstr ""
 
-#: paperless/settings.py:778
+#: paperless/settings.py:776
 msgid "Bulgarian"
 msgstr ""
 
-#: paperless/settings.py:779
+#: paperless/settings.py:777
 msgid "Catalan"
 msgstr ""
 
-#: paperless/settings.py:780
+#: paperless/settings.py:778
 msgid "Czech"
 msgstr ""
 
-#: paperless/settings.py:781
+#: paperless/settings.py:779
 msgid "Danish"
 msgstr ""
 
-#: paperless/settings.py:782
+#: paperless/settings.py:780
 msgid "German"
 msgstr ""
 
-#: paperless/settings.py:783
+#: paperless/settings.py:781
 msgid "Greek"
 msgstr ""
 
-#: paperless/settings.py:784
+#: paperless/settings.py:782
 msgid "English (GB)"
 msgstr ""
 
-#: paperless/settings.py:785
+#: paperless/settings.py:783
 msgid "Spanish"
 msgstr ""
 
-#: paperless/settings.py:786
+#: paperless/settings.py:784
 msgid "Persian"
 msgstr ""
 
-#: paperless/settings.py:787
+#: paperless/settings.py:785
 msgid "Finnish"
 msgstr ""
 
-#: paperless/settings.py:788
+#: paperless/settings.py:786
 msgid "French"
 msgstr ""
 
-#: paperless/settings.py:789
+#: paperless/settings.py:787
 msgid "Hungarian"
 msgstr ""
 
-#: paperless/settings.py:790
+#: paperless/settings.py:788
 msgid "Italian"
 msgstr ""
 
-#: paperless/settings.py:791
+#: paperless/settings.py:789
 msgid "Japanese"
 msgstr ""
 
-#: paperless/settings.py:792
+#: paperless/settings.py:790
 msgid "Korean"
 msgstr ""
 
-#: paperless/settings.py:793
+#: paperless/settings.py:791
 msgid "Luxembourgish"
 msgstr ""
 
-#: paperless/settings.py:794
+#: paperless/settings.py:792
 msgid "Norwegian"
 msgstr ""
 
-#: paperless/settings.py:795
+#: paperless/settings.py:793
 msgid "Dutch"
 msgstr ""
 
-#: paperless/settings.py:796
+#: paperless/settings.py:794
 msgid "Polish"
 msgstr ""
 
-#: paperless/settings.py:797
+#: paperless/settings.py:795
 msgid "Portuguese (Brazil)"
 msgstr ""
 
-#: paperless/settings.py:798
+#: paperless/settings.py:796
 msgid "Portuguese"
 msgstr ""
 
-#: paperless/settings.py:799
+#: paperless/settings.py:797
 msgid "Romanian"
 msgstr ""
 
-#: paperless/settings.py:800
+#: paperless/settings.py:798
 msgid "Russian"
 msgstr ""
 
-#: paperless/settings.py:801
+#: paperless/settings.py:799
 msgid "Slovak"
 msgstr ""
 
-#: paperless/settings.py:802
+#: paperless/settings.py:800
 msgid "Slovenian"
 msgstr ""
 
-#: paperless/settings.py:803
+#: paperless/settings.py:801
 msgid "Serbian"
 msgstr ""
 
-#: paperless/settings.py:804
+#: paperless/settings.py:802
 msgid "Swedish"
 msgstr ""
 
-#: paperless/settings.py:805
+#: paperless/settings.py:803
 msgid "Turkish"
 msgstr ""
 
-#: paperless/settings.py:806
+#: paperless/settings.py:804
 msgid "Ukrainian"
 msgstr ""
 
-#: paperless/settings.py:807
+#: paperless/settings.py:805
 msgid "Vietnamese"
 msgstr ""
 
-#: paperless/settings.py:808
+#: paperless/settings.py:806
 msgid "Chinese Simplified"
 msgstr ""
 
-#: paperless/settings.py:809
+#: paperless/settings.py:807
 msgid "Chinese Traditional"
 msgstr ""
 

src/paperless/middleware.py

@@ -1,14 +1,7 @@
-import logging
-import os
-import resource
-import time
-
 from django.conf import settings
 
 from paperless import version
 
-logger = logging.getLogger("middleware")
-
 
 class ApiVersionMiddleware:
     def __init__(self, get_response):
@@ -22,56 +15,3 @@ class ApiVersionMiddleware:
             response["X-Version"] = version.__full_version_str__
 
         return response
-
-
-try:
-    import psutil
-
-    _PSUTIL = True
-except Exception:
-    _PSUTIL = False
-
-
-class MemLogMiddleware:
-    def __init__(self, get_response):
-        self.get_response = get_response
-
-    def __call__(self, request):
-        # capture baseline
-        ru_before = resource.getrusage(resource.RUSAGE_SELF).ru_maxrss
-        if _PSUTIL:
-            p = psutil.Process()
-            rss_before = p.memory_info().rss
-        else:
-            rss_before = 0
-
-        t0 = time.perf_counter()
-        try:
-            return self.get_response(request)
-        finally:
-            dur_ms = (time.perf_counter() - t0) * 1000.0
-
-            ru_after = resource.getrusage(resource.RUSAGE_SELF).ru_maxrss
-            # ru_maxrss is KB on Linux; convert to MB
-            peak_mb = (ru_after) / 1024.0
-            peak_delta_mb = (ru_after - ru_before) / 1024.0
-
-            if _PSUTIL:
-                rss_after = p.memory_info().rss
-                delta_mb = (rss_after - rss_before) / (1024 * 1024)
-                rss_mb = rss_after / (1024 * 1024)
-            else:
-                delta_mb = 0.0
-                rss_mb = 0.0
-
-            logger.debug(
-                "pid=%s mem rss=%.1fMB Δend=%.1fMB peak=%.1fMB Δpeak=%.1fMB dur=%.1fms %s %s",
-                os.getpid(),
-                rss_mb,
-                delta_mb,
-                peak_mb,
-                peak_delta_mb,
-                dur_ms,
-                request.method,
-                request.path,
-            )

src/paperless/settings.py

@@ -17,8 +17,6 @@ from dateparser.languages.loader import LocaleDataLoader
 from django.utils.translation import gettext_lazy as _
 from dotenv import load_dotenv
 
-from paperless.utils import ocr_to_dateparser_languages
-
 logger = logging.getLogger("paperless.settings")
 
 # Tap paperless.conf if it's available
@@ -363,7 +361,6 @@ if DEBUG:
     )
 
 MIDDLEWARE = [
-    "paperless.middleware.MemLogMiddleware",
     "django.middleware.security.SecurityMiddleware",
     "whitenoise.middleware.WhiteNoiseMiddleware",
     "django.contrib.sessions.middleware.SessionMiddleware",
@@ -834,7 +831,7 @@ LOGGING = {
     "disable_existing_loggers": False,
     "formatters": {
         "verbose": {
-            "format": "[{asctime}] [{levelname}] [{name}] pid={process} {message}",
+            "format": "[{asctime}] [{levelname}] [{name}] {message}",
             "style": "{",
         },
         "simple": {
@@ -879,7 +876,6 @@ LOGGING = {
         "kombu": {"handlers": ["file_celery"], "level": "DEBUG"},
         "_granian": {"handlers": ["file_paperless"], "level": "DEBUG"},
         "granian.access": {"handlers": ["file_paperless"], "level": "DEBUG"},
-        "middleware": {"handlers": ["console"], "level": "DEBUG"},
     },
 }
 
@@ -1186,61 +1182,6 @@ DATE_ORDER = os.getenv("PAPERLESS_DATE_ORDER", "DMY")
 FILENAME_DATE_ORDER = os.getenv("PAPERLESS_FILENAME_DATE_ORDER")
 
 
-def _ocr_to_dateparser_languages(ocr_languages: str) -> list[str]:
-    """
-    Convert Tesseract OCR_LANGUAGE codes (ISO 639-2, e.g. "eng+fra", with optional scripts like "aze_Cyrl")
-    into a list of locales compatible with the `dateparser` library.
-
-    - If a script is provided (e.g., "aze_Cyrl"), attempts to use the full locale (e.g., "az-Cyrl").
-    Falls back to the base language (e.g., "az") if needed.
-    - If a language cannot be mapped or validated, it is skipped with a warning.
-    - Returns a list of valid locales, or an empty list if none could be converted.
-    """
-    ocr_to_dateparser = ocr_to_dateparser_languages()
-    loader = LocaleDataLoader()
-    result = []
-    try:
-        for ocr_language in ocr_languages.split("+"):
-            # Split into language and optional script
-            ocr_lang_part, *script = ocr_language.split("_")
-            ocr_script_part = script[0] if script else None
-
-            language_part = ocr_to_dateparser.get(ocr_lang_part)
-            if language_part is None:
-                logger.debug(
-                    f'Unable to map OCR language "{ocr_lang_part}" to dateparser locale. ',
-                )
-                continue
-
-            # Ensure base language is supported by dateparser
-            loader.get_locale_map(locales=[language_part])
-
-            # Try to add the script part if it's supported by dateparser
-            if ocr_script_part:
-                dateparser_language = f"{language_part}-{ocr_script_part.title()}"
-                try:
-                    loader.get_locale_map(locales=[dateparser_language])
-                except Exception:
-                    logger.info(
-                        f"Language variant '{dateparser_language}' not supported by dateparser; falling back to base language '{language_part}'. You can manually set PAPERLESS_DATE_PARSER_LANGUAGES if needed.",
-                    )
-                    dateparser_language = language_part
-            else:
-                dateparser_language = language_part
-            if dateparser_language not in result:
-                result.append(dateparser_language)
-    except Exception as e:
-        logger.warning(
-            f"Error auto-configuring dateparser languages. Set PAPERLESS_DATE_PARSER_LANGUAGES parameter to avoid this. Detail: {e}",
-        )
-        return []
-    if not result:
-        logger.info(
-            "Unable to automatically determine dateparser languages from OCR_LANGUAGE, falling back to multi-language support.",
-        )
-    return result
-
-
 def _parse_dateparser_languages(languages: str | None):
     language_list = languages.split("+") if languages else []
     # There is an unfixed issue in zh-Hant and zh-Hans locales in the dateparser lib.
@@ -1255,12 +1196,14 @@ def _parse_dateparser_languages(languages: str | None):
     return list(LocaleDataLoader().get_locale_map(locales=language_list))
 
 
-if os.getenv("PAPERLESS_DATE_PARSER_LANGUAGES"):
+# If not set, we will infer it at runtime
-    DATE_PARSER_LANGUAGES = _parse_dateparser_languages(
+DATE_PARSER_LANGUAGES = (
+    _parse_dateparser_languages(
         os.getenv("PAPERLESS_DATE_PARSER_LANGUAGES"),
     )
-else:
+    if os.getenv("PAPERLESS_DATE_PARSER_LANGUAGES")
-    DATE_PARSER_LANGUAGES = _ocr_to_dateparser_languages(OCR_LANGUAGE)
+    else None
+)
 
 
 # Maximum number of dates taken from document start to end to show as suggestions for

src/paperless/tests/test_settings.py

@@ -6,7 +6,6 @@ from unittest import mock
 import pytest
 from celery.schedules import crontab
 
-from paperless.settings import _ocr_to_dateparser_languages
 from paperless.settings import _parse_base_paths
 from paperless.settings import _parse_beat_schedule
 from paperless.settings import _parse_dateparser_languages
@@ -476,33 +475,6 @@ class TestPathSettings(TestCase):
         self.assertEqual("/foobar/", base_paths[4])  # LOGOUT_REDIRECT_URL
 
 
-@pytest.mark.parametrize(
-    ("ocr_language", "expected"),
-    [
-        # One language
-        ("eng", ["en"]),
-        # Multiple languages
-        ("fra+ita+lao", ["fr", "it", "lo"]),
-        # Languages that don't have a two-letter equivalent
-        ("fil", ["fil"]),
-        # Languages with a script part supported by dateparser
-        ("aze_cyrl+srp_latn", ["az-Cyrl", "sr-Latn"]),
-        # Languages with a script part not supported by dateparser
-        # In this case, default to the language without script
-        ("deu_frak", ["de"]),
-        # Traditional and simplified chinese don't have the same name in dateparser,
-        # so they're converted to the general chinese language
-        ("chi_tra+chi_sim", ["zh"]),
-        # If a language is not supported by dateparser, fallback to the supported ones
-        ("eng+unsupported_language+por", ["en", "pt"]),
-        # If no language is supported, fallback to default
-        ("unsupported1+unsupported2", []),
-    ],
-)
-def test_ocr_to_dateparser_languages(ocr_language, expected):
-    assert sorted(_ocr_to_dateparser_languages(ocr_language)) == sorted(expected)
-
-
 @pytest.mark.parametrize(
     ("languages", "expected"),
     [

src/paperless/tests/test_utils.py

@@ -0,0 +1,52 @@
+import logging
+
+import pytest
+
+from paperless import utils
+from paperless.utils import ocr_to_dateparser_languages
+
+
+@pytest.mark.parametrize(
+    ("ocr_language", "expected"),
+    [
+        # One language
+        ("eng", ["en"]),
+        # Multiple languages
+        ("fra+ita+lao", ["fr", "it", "lo"]),
+        # Languages that don't have a two-letter equivalent
+        ("fil", ["fil"]),
+        # Languages with a script part supported by dateparser
+        ("aze_cyrl+srp_latn", ["az-Cyrl", "sr-Latn"]),
+        # Languages with a script part not supported by dateparser
+        # In this case, default to the language without script
+        ("deu_frak", ["de"]),
+        # Traditional and simplified chinese don't have the same name in dateparser,
+        # so they're converted to the general chinese language
+        ("chi_tra+chi_sim", ["zh"]),
+        # If a language is not supported by dateparser, fallback to the supported ones
+        ("eng+unsupported_language+por", ["en", "pt"]),
+        # If no language is supported, fallback to default
+        ("unsupported1+unsupported2", []),
+        # Duplicate languages, should not duplicate in result
+        ("eng+eng", ["en"]),
+        # Language with script, but script is not mapped
+        ("ita_unknownscript", ["it"]),
+    ],
+)
+def test_ocr_to_dateparser_languages(ocr_language, expected):
+    assert sorted(ocr_to_dateparser_languages(ocr_language)) == sorted(expected)
+
+
+def test_ocr_to_dateparser_languages_exception(monkeypatch, caplog):
+    # Patch LocaleDataLoader.get_locale_map to raise an exception
+    class DummyLoader:
+        def get_locale_map(self, locales=None):
+            raise RuntimeError("Simulated error")
+
+    with caplog.at_level(logging.WARNING):
+        monkeypatch.setattr(utils, "LocaleDataLoader", lambda: DummyLoader())
+        result = utils.ocr_to_dateparser_languages("eng+fra")
+        assert result == []
+        assert (
+            "Set PAPERLESS_DATE_PARSER_LANGUAGES parameter to avoid this" in caplog.text
+        )

src/paperless/utils.py

@@ -1,4 +1,10 @@
-def ocr_to_dateparser_languages() -> dict[str, str]:
+import logging
+
+from dateparser.languages.loader import LocaleDataLoader
+
+logger = logging.getLogger("paperless.utils")
+
+OCR_TO_DATEPARSER_LANGUAGES = {
     """
     Translation map from languages supported by Tesseract OCR
     to languages supported by dateparser.
@@ -14,7 +20,6 @@ def ocr_to_dateparser_languages() -> dict[str, str]:
     # agq, asa, bez, brx, cgg, ckb, dav, dje, dyo, ebu, guz, jgo, jmc, kde, kea, khq, kln,
     # ksb, ksf, ksh, lag, lkt, lrc, luy, mer, mfe, mgh, mgo, mua, mzn, naq, nmg, nnh, nus,
     # rof, rwk, saq, sbp, she, ses, shi, teo, twq, tzm, vun, wae, xog, yav, yue
-    return {
     "afr": "af",
     "amh": "am",
     "ara": "ar",
@@ -108,3 +113,57 @@ def ocr_to_dateparser_languages() -> dict[str, str]:
     "yor": "yo",
     "chi": "zh",
 }
+
+
+def ocr_to_dateparser_languages(ocr_languages: str) -> list[str]:
+    """
+    Convert Tesseract OCR_LANGUAGE codes (ISO 639-2, e.g. "eng+fra", with optional scripts like "aze_Cyrl")
+    into a list of locales compatible with the `dateparser` library.
+
+    - If a script is provided (e.g., "aze_Cyrl"), attempts to use the full locale (e.g., "az-Cyrl").
+    Falls back to the base language (e.g., "az") if needed.
+    - If a language cannot be mapped or validated, it is skipped with a warning.
+    - Returns a list of valid locales, or an empty list if none could be converted.
+    """
+    loader = LocaleDataLoader()
+    result = []
+    try:
+        for ocr_language in ocr_languages.split("+"):
+            # Split into language and optional script
+            ocr_lang_part, *script = ocr_language.split("_")
+            ocr_script_part = script[0] if script else None
+
+            language_part = OCR_TO_DATEPARSER_LANGUAGES.get(ocr_lang_part)
+            if language_part is None:
+                logger.debug(
+                    f'Unable to map OCR language "{ocr_lang_part}" to dateparser locale. ',
+                )
+                continue
+
+            # Ensure base language is supported by dateparser
+            loader.get_locale_map(locales=[language_part])
+
+            # Try to add the script part if it's supported by dateparser
+            if ocr_script_part:
+                dateparser_language = f"{language_part}-{ocr_script_part.title()}"
+                try:
+                    loader.get_locale_map(locales=[dateparser_language])
+                except Exception:
+                    logger.info(
+                        f"Language variant '{dateparser_language}' not supported by dateparser; falling back to base language '{language_part}'. You can manually set PAPERLESS_DATE_PARSER_LANGUAGES if needed.",
+                    )
+                    dateparser_language = language_part
+            else:
+                dateparser_language = language_part
+            if dateparser_language not in result:
+                result.append(dateparser_language)
+    except Exception as e:
+        logger.warning(
+            f"Error auto-configuring dateparser languages. Set PAPERLESS_DATE_PARSER_LANGUAGES parameter to avoid this. Detail: {e}",
+        )
+        return []
+    if not result:
+        logger.info(
+            "Unable to automatically determine dateparser languages from OCR_LANGUAGE, falling back to multi-language support.",
+        )
+    return result

uv.lock

@@ -2046,7 +2046,6 @@ dependencies = [
     { name = "ocrmypdf", marker = "sys_platform == 'darwin' or sys_platform == 'linux'" },
     { name = "pathvalidate", marker = "sys_platform == 'darwin' or sys_platform == 'linux'" },
     { name = "pdf2image", marker = "sys_platform == 'darwin' or sys_platform == 'linux'" },
-    { name = "psutil", marker = "sys_platform == 'darwin' or sys_platform == 'linux'" },
     { name = "psycopg-pool", marker = "sys_platform == 'darwin' or sys_platform == 'linux'" },
     { name = "python-dateutil", marker = "sys_platform == 'darwin' or sys_platform == 'linux'" },
     { name = "python-dotenv", marker = "sys_platform == 'darwin' or sys_platform == 'linux'" },
@@ -2183,7 +2182,6 @@ requires-dist = [
     { name = "ocrmypdf", specifier = "~=16.10.0" },
     { name = "pathvalidate", specifier = "~=3.3.1" },
     { name = "pdf2image", specifier = "~=1.17.0" },
-    { name = "psutil", specifier = ">=7.0.0" },
     { name = "psycopg", extras = ["c", "pool"], marker = "extra == 'postgres'", specifier = "==3.2.9" },
     { name = "psycopg-c", marker = "python_full_version == '3.12.*' and platform_machine == 'aarch64' and sys_platform == 'linux' and extra == 'postgres'", url = "https://github.com/paperless-ngx/builder/releases/download/psycopg-3.2.9/psycopg_c-3.2.9-cp312-cp312-linux_aarch64.whl" },
     { name = "psycopg-c", marker = "python_full_version == '3.12.*' and platform_machine == 'x86_64' and sys_platform == 'linux' and extra == 'postgres'", url = "https://github.com/paperless-ngx/builder/releases/download/psycopg-3.2.9/psycopg_c-3.2.9-cp312-cp312-linux_x86_64.whl" },
@@ -2550,19 +2548,6 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/e4/ea/d836f008d33151c7a1f62caf3d8dd782e4d15f6a43897f64480c2b8de2ad/prompt_toolkit-3.0.50-py3-none-any.whl", hash = "sha256:9b6427eb19e479d98acff65196a307c555eb567989e6d88ebbb1b509d9779198", size = 387816, upload-time = "2025-01-20T15:55:29.98Z" },
 ]
 
-[[package]]
-name = "psutil"
-version = "7.0.0"
-source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/2a/80/336820c1ad9286a4ded7e845b2eccfcb27851ab8ac6abece774a6ff4d3de/psutil-7.0.0.tar.gz", hash = "sha256:7be9c3eba38beccb6495ea33afd982a44074b78f28c434a1f51cc07fd315c456", size = 497003, upload-time = "2025-02-13T21:54:07.946Z" }
-wheels = [
-    { url = "https://files.pythonhosted.org/packages/ed/e6/2d26234410f8b8abdbf891c9da62bee396583f713fb9f3325a4760875d22/psutil-7.0.0-cp36-abi3-macosx_10_9_x86_64.whl", hash = "sha256:101d71dc322e3cffd7cea0650b09b3d08b8e7c4109dd6809fe452dfd00e58b25", size = 238051, upload-time = "2025-02-13T21:54:12.36Z" },
-    { url = "https://files.pythonhosted.org/packages/04/8b/30f930733afe425e3cbfc0e1468a30a18942350c1a8816acfade80c005c4/psutil-7.0.0-cp36-abi3-macosx_11_0_arm64.whl", hash = "sha256:39db632f6bb862eeccf56660871433e111b6ea58f2caea825571951d4b6aa3da", size = 239535, upload-time = "2025-02-13T21:54:16.07Z" },
-    { url = "https://files.pythonhosted.org/packages/2a/ed/d362e84620dd22876b55389248e522338ed1bf134a5edd3b8231d7207f6d/psutil-7.0.0-cp36-abi3-manylinux_2_12_i686.manylinux2010_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:1fcee592b4c6f146991ca55919ea3d1f8926497a713ed7faaf8225e174581e91", size = 275004, upload-time = "2025-02-13T21:54:18.662Z" },
-    { url = "https://files.pythonhosted.org/packages/bf/b9/b0eb3f3cbcb734d930fdf839431606844a825b23eaf9a6ab371edac8162c/psutil-7.0.0-cp36-abi3-manylinux_2_12_x86_64.manylinux2010_x86_64.manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:4b1388a4f6875d7e2aff5c4ca1cc16c545ed41dd8bb596cefea80111db353a34", size = 277986, upload-time = "2025-02-13T21:54:21.811Z" },
-    { url = "https://files.pythonhosted.org/packages/eb/a2/709e0fe2f093556c17fbafda93ac032257242cabcc7ff3369e2cb76a97aa/psutil-7.0.0-cp36-abi3-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:a5f098451abc2828f7dc6b58d44b532b22f2088f4999a937557b603ce72b1993", size = 279544, upload-time = "2025-02-13T21:54:24.68Z" },
-]
-
 [[package]]
 name = "psycopg"
 version = "3.2.9"