Remove SYSTRAN machine translation integration (mozilla#4180) (mozilla#4181)

SYSTRAN integration is no longer used. Remove the view, URL, frontend
fetch/component, Locale model fields (and add matching migration),
API field, SYSTRAN_TRANSLATE_API_KEY family of settings, the
data-is-systran-translate-supported flag passed to the translate view,
and the l10n strings.

Translation.MachinerySource.SYSTRAN_TRANSLATE is intentionally retained
so existing translations attributed to SYSTRAN remain valid; only the
live integration is removed.

Also: Fix Node version mismatch in the backend workflow

Author: mathjazz

.github/workflows/backend.yml

@@ -76,6 +76,8 @@ jobs:
           -e '/^SITE_URL=/d'
           docker/config/server.env.template > .env
       # Run collectstatic with minimal dependencies, skipping the actual front-end build
+      - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
+        with: { node-version: '24' }
       - run: npm install
         working-directory: pontoon
       - run: mkdir -p translate/dist translate/public

documentation/docs/dev/deployment.md

@@ -297,9 +297,6 @@ cache is cleared and the subsequent task can run. The value should
 exceed the longest sync task of the instance. The default value is 3600
 seconds (1 hour).
 
-`SYSTRAN_TRANSLATE_API_KEY`  
-Optional. Set your [Systran Translate](https://auth.systran.net/oidc/interaction/OcxBMUAbEIkN6tIg1yIcp) API key to use machine translation by Systran.
-
 `TBX_DESCRIPTION`  
 Optional. Description to be used in the header of the Terminology (`.TBX`)
 files.

documentation/docs/localizer/translation-workspace.md

@@ -273,7 +273,6 @@ Machinery shows possible translations from a variety of sources. These sources i
 
 * [Pontoon’s internal translation memory](translate.md#downloading-and-uploading-translations).
 * [Google Translate](https://translate.google.com).
-* [SYSTRAN](https://www.systran.net/).
 * [Caighdean](https://github.com/kscanne/caighdean).
 * [Bing Translator](https://www.bing.com/translator) (not currently enabled on pontoon.mozilla.org).
 

pontoon/api/serializers.py

@@ -112,7 +112,6 @@ class Meta:
             "google_translate_code",
             "ms_terminology_code",
             "ms_translator_code",
-            "systran_translate_code",
             "team_description",
         ] + TRANSLATION_STATS_FIELDS
 

pontoon/api/tests/test_views.py

@@ -138,7 +138,6 @@ def test_locale(django_assert_num_queries):
         "google_translate_code": "",
         "ms_terminology_code": "",
         "ms_translator_code": "",
-        "systran_translate_code": "",
         "team_description": "",
         "total_strings": 25,
         "approved_strings": 10,
@@ -221,7 +220,6 @@ def test_locales(django_assert_num_queries):
             "google_translate_code": loc.google_translate_code,
             "ms_terminology_code": loc.ms_terminology_code,
             "ms_translator_code": loc.ms_translator_code,
-            "systran_translate_code": loc.systran_translate_code,
             "team_description": loc.team_description,
             "total_strings": loc.total_strings,
             "approved_strings": loc.approved_strings,
@@ -967,7 +965,6 @@ def test_project_locale(django_assert_num_queries):
             "google_translate_code": "af",
             "ms_terminology_code": "af-za",
             "ms_translator_code": "af",
-            "systran_translate_code": "",
             "team_description": "",
             "total_strings": 25,
             "approved_strings": 10,

pontoon/base/migrations/0116_remove_systran_locale_fields.py

@@ -0,0 +1,20 @@
+# Generated by Django 5.2.13 on 2026-05-29 19:12
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("base", "0115_alter_userprofile_username_and_more"),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name="locale",
+            name="systran_translate_code",
+        ),
+        migrations.RemoveField(
+            model_name="locale",
+            name="systran_translate_profile",
+        ),
+    ]

pontoon/base/models/locale.py

@@ -1,9 +1,5 @@
-import json
 import logging
 
-import requests
-
-from django.conf import settings
 from django.contrib.auth.models import Group
 from django.core.exceptions import ValidationError
 from django.db import models
@@ -186,26 +182,6 @@ def aggregated_stats_query(self):
         """,
     )
 
-    # Fields used by optional SYSTRAN services
-    systran_translate_code = models.CharField(
-        max_length=20,
-        blank=True,
-        help_text="""
-        SYSTRAN maintains its own list of
-        <a href="https://platform.systran.net/index">supported locales</a>.
-        Choose a matching locale from the list or leave blank to disable
-        support for SYSTRAN machine translation service.
-        """,
-    )
-    systran_translate_profile = models.CharField(
-        max_length=128,
-        blank=True,
-        help_text="""
-        SYSTRAN Profile UUID to specify the engine trained on the en-locale language pair.
-        The field is updated automatically after the systran_translate_code field changes.
-        """,
-    )
-
     db_collation = models.CharField(
         max_length=20,
         blank=True,
@@ -336,7 +312,6 @@ def serialize(self):
             "script": self.script,
             "google_translate_code": self.google_translate_code,
             "ms_translator_code": self.ms_translator_code,
-            "systran_translate_code": self.systran_translate_code,
             "ms_terminology_code": self.ms_terminology_code,
         }
 
@@ -369,50 +344,3 @@ def get_latest_activity(self):
         return (
             self.latest_translation.latest_activity if self.latest_translation else None
         )
-
-    def save(self, *args, **kwargs):
-        old = Locale.objects.get(pk=self.pk) if self.pk else None
-        super().save(*args, **kwargs)
-
-        # If SYSTRAN Translate code changes, update SYSTRAN Profile UUID.
-        if old is None or old.systran_translate_code == self.systran_translate_code:
-            return
-
-        if not self.systran_translate_code:
-            return
-
-        api_key = settings.SYSTRAN_TRANSLATE_API_KEY
-        server = settings.SYSTRAN_TRANSLATE_SERVER
-        profile_owner = settings.SYSTRAN_TRANSLATE_PROFILE_OWNER
-        if not (api_key or server or profile_owner):
-            return
-
-        url = f"{server}/translation/supportedLanguages"
-
-        payload = {
-            "key": api_key,
-            "source": "en",
-            "target": self.systran_translate_code,
-        }
-
-        try:
-            r = requests.post(url, params=payload)
-            root = json.loads(r.content)
-
-            if "error" in root:
-                log.error(
-                    "Unable to retrieve SYSTRAN Profile UUID: {error}".format(
-                        error=root
-                    )
-                )
-                return
-
-            for languagePair in root["languagePairs"]:
-                for profile in languagePair["profiles"]:
-                    if profile["selectors"]["owner"] == profile_owner:
-                        self.systran_translate_profile = profile["id"]
-                        self.save(update_fields=["systran_translate_profile"])
-                        return
-
-        except requests.exceptions.RequestException as e:
-            log.error(f"Unable to retrieve SYSTRAN Profile UUID: {e}")

pontoon/machinery/urls.py

@@ -22,11 +22,6 @@
         views.microsoft_translator,
         name="pontoon.microsoft_translator",
     ),
-    path(
-        "systran-translate/",
-        views.systran_translate,
-        name="pontoon.systran_translate",
-    ),
     path("caighdean/", views.caighdean, name="pontoon.caighdean"),
     path(
         "microsoft-terminology/",

pontoon/machinery/views.py

@@ -8,7 +8,6 @@
 
 from sacremoses import MosesDetokenizer
 
-from django.conf import settings
 from django.contrib.auth.decorators import login_required
 from django.core.paginator import EmptyPage, Paginator
 from django.http import JsonResponse
@@ -228,62 +227,6 @@ def gpt_transform(request):
         return _machinery_error_response("GPT Transform", e)
 
 
-@login_required(redirect_field_name="", login_url="/403")
-def systran_translate(request):
-    """Get translations from SYSTRAN machine translation service."""
-    try:
-        text = request.GET["text"]
-        locale_code = request.GET["locale"]
-
-        if not locale_code:
-            raise ValueError("Locale code is empty")
-
-        locale = Locale.objects.filter(systran_translate_code=locale_code).first()
-
-        api_key = settings.SYSTRAN_TRANSLATE_API_KEY
-        if not api_key:
-            raise ValueError("Missing api key")
-
-    except (Locale.DoesNotExist, MultiValueDictKeyError, ValueError) as e:
-        return JsonResponse(
-            {"status": False, "message": f"Bad Request: {e}"},
-            status=400,
-        )
-
-    url = "https://api-translate.systran.net/translation/text/translate"
-
-    payload = {
-        "key": api_key,
-        "input": text,
-        "source": "en",
-        "target": locale_code,
-        "profile": locale.systran_translate_profile,
-        "format": "text",
-    }
-
-    r = None
-    try:
-        r = requests.post(url, params=payload)
-        r.raise_for_status()
-
-        root = json.loads(r.content)
-
-        if "error" in root:
-            log.error(f"SYSTRAN error: {root}")
-            return JsonResponse(
-                {"status": False, "message": f"Bad Request: {root}"},
-                status=400,
-            )
-
-        return JsonResponse({"translation": root["outputs"][0]["output"]})
-
-    except requests.exceptions.RequestException as e:
-        return JsonResponse(
-            {"status": False, "message": f"{e}"},
-            status=r.status_code if r is not None else 500,
-        )
-
-
 def caighdean(request):
     """Get translation from Caighdean machine translation service."""
     try:

pontoon/settings/base.py

@@ -173,11 +173,6 @@ def path(*args):
 # Microsoft Translator API Key
 MICROSOFT_TRANSLATOR_API_KEY = os.environ.get("MICROSOFT_TRANSLATOR_API_KEY", "")
 
-# SYSTRAN Translate Settings
-SYSTRAN_TRANSLATE_API_KEY = os.environ.get("SYSTRAN_TRANSLATE_API_KEY", "")
-SYSTRAN_TRANSLATE_SERVER = os.environ.get("SYSTRAN_TRANSLATE_SERVER", "")
-SYSTRAN_TRANSLATE_PROFILE_OWNER = os.environ.get("SYSTRAN_TRANSLATE_PROFILE_OWNER", "")
-
 # Microsoft Translator API Key
 OPENAI_API_KEY = os.environ.get("OPENAI_API_KEY", "")
 OPENAI_MODEL = os.environ.get("OPENAI_MODEL", "gpt-4.1-2025-04-14")