Saved user language was not being picked up in case of non-server mode.

Because - the get_locale(...) function was being executed before any
request, and user login after first request. Hence - the values for
the labels in the Preferences are not being translated properly.

Fetch the raw value of user_language from configuration in case of
runtime/non-server mode to fix the issue.

web/pgadmin/__init__.py

@@ -17,7 +17,7 @@ from importlib import import_module
 from flask import Flask, abort, request, current_app, session, url_for
 from flask_babel import Babel, gettext
 from flask_login import user_logged_in, user_logged_out
-from flask_security import Security, SQLAlchemyUserDatastore
+from flask_security import Security, SQLAlchemyUserDatastore, current_user
 from flask_mail import Mail
 from flask_security.utils import login_user
 from werkzeug.datastructures import ImmutableDict
@@ -242,13 +242,17 @@ def create_app(app_name=None):
         language = 'en'
         if config.SERVER_MODE is False:
             # Get the user language preference from the miscellaneous module
-            misc_preference = Preferences.module('miscellaneous', False)
-            if misc_preference:
-                user_languages = misc_preference.preference(
-                    'user_language'
+            if current_user.is_authenticated:
+                user_id = current_user.id
+            else:
+                user = user_datastore.get_user(config.DESKTOP_USER)
+                if user is not None:
+                    user_id = user.id
+            user_language = Preferences.raw_value(
+                'miscellaneous', 'user_language', None, user_id
             )
-                if user_languages:
-                    language = user_languages.get() or language
+            if user_language is not None:
+                language = user_language
         else:
             # If language is available in get request then return the same
             # otherwise check the session or cookie

web/pgadmin/utils/preferences.py

@@ -473,6 +473,41 @@ class Preferences(object):
             options, help_str, category_label
         )
 
+    @staticmethod
+    def raw_value(_module, _preference, _category=None, _user_id=None):
+        # Find the entry for this module in the configuration database.
+        module = ModulePrefTable.query.filter_by(name=_module).first()
+
+        if module is None:
+            return None
+
+        if _category is None:
+            _category = _module
+
+        if _user_id is None:
+            _user_id = getattr(current_user, 'id', None)
+            if _user_id is None:
+                return None
+
+        cat = PrefCategoryTbl.query.filter_by(mid=module.id).filter_by(name=_category).first()
+
+        if cat is None:
+            return None
+
+        pref = PrefTable.query.filter_by(name=_preference).filter_by(cid=cat.id).first()
+
+        if pref is None:
+            return None
+
+        user_pref  = UserPrefTable.query.filter_by(
+            pid=pref.id
+        ).filter_by(uid=_user_id).first()
+
+        if user_pref is not None:
+            return user_pref.value
+
+        return None
+
     @classmethod
     def module(cls, name, create=True):
         """