feat(languages): add Slovenian (sl) to the supported languages (#995)

Slovenian was missing from SUPPORTED_LANGUAGES, so the Settings picker did not offer it and normalize_language_shortcuts dropped any shortcut bound to it. Add it as a Whisper-only entry (whisper code sl; alphacephei publishes no Slovenian VOSK model), map the Slovenian XKB layout si to it for follow-keyboard-layout, and list it on the website languages page.

Fixes #970

tests/test_language_shortcuts.py

@@ -60,12 +60,14 @@ def test_normalize_language_shortcuts_keeps_valid_bindings() -> None:
         [
             {"shortcut": "alt+d", "language": "de"},
             {"shortcut": "ctrl+alt+g", "language": "hu"},
+            {"shortcut": "ctrl+alt+s", "language": "sl"},
             {"shortcut": "f5", "language": "auto"},
         ]
     )
     assert entries == [
         {"shortcut": "alt+d", "language": "de"},
         {"shortcut": "ctrl+alt+g", "language": "hu"},
+        {"shortcut": "ctrl+alt+s", "language": "sl"},
         {"shortcut": "f5", "language": "auto"},
     ]
 
@@ -1023,3 +1025,50 @@ def test_language_shortcut_managers_share_the_evdev_device_layer() -> None:
     assert isinstance(german.backend_instance, EvdevKeyboardBackend)
     assert isinstance(french.backend_instance, EvdevKeyboardBackend)
     assert french.backend_instance._hub is german.backend_instance._hub
+
+
+@pytest.mark.parametrize(
+    "engine,offered",
+    [("whisper_cpp", True), ("whisper", True), ("remote_api", True), ("vosk", False)],
+)
+def test_settings_language_picker_offers_slovenian_on_whisper_engines(
+    settings_dialog: Any, dialog_class: type[Any], engine: str, offered: bool
+) -> None:
+    """Slovenian (#970) is selectable wherever Whisper runs; VOSK has no model for it."""
+    dialog = MagicMock()
+    dialog.engine_combo.get_active_text.return_value = settings_dialog.ENGINE_DISPLAY_NAMES[engine]
+
+    with patch.object(settings_dialog, "_is_vosk_model_downloaded", return_value=False):
+        dialog_class._populate_language_options(dialog)
+
+    appended = [c.args[0] for c in dialog.language_combo.append.call_args_list]
+    assert ("sl" in appended) is offered
+    assert "sk" not in appended
+
+
+def test_slovenian_shortcut_row_persists_through_config(
+    dialog_class: type[Any], tmp_path: Any
+) -> None:
+    """A row picked as Slovenian is saved and read back, not dropped (#970)."""
+    config_dir = tmp_path / "vocalinux"
+    config_dir.mkdir()
+    with (
+        patch("vocalinux.ui.config_manager.CONFIG_DIR", str(config_dir)),
+        patch("vocalinux.ui.config_manager.CONFIG_FILE", str(config_dir / "config.json")),
+        patch("vocalinux.utils.system_language.detect_system_language", return_value=None),
+    ):
+        dialog = _dialog_stub()
+        dialog.config_manager = ConfigManager()
+        dialog.config_manager.save_settings = dialog.config_manager.save_config
+        picker, entry = MagicMock(), MagicMock()
+        picker.get_active_id.return_value = "sl"
+        entry.get_text.return_value = "ctrl+alt+s"
+        refs = {"language_picker": picker, "shortcut_entry": entry, "row": MagicMock()}
+        dialog._language_shortcut_rows = [refs]
+        dialog._report_language_shortcut_rejections = MagicMock()
+
+        dialog_class._persist_language_shortcuts(dialog)
+
+        assert ConfigManager().get_language_shortcuts() == [
+            {"shortcut": "ctrl+alt+s", "language": "sl"}
+        ]

tests/test_main.py

@@ -104,7 +104,7 @@ class TestMainModule(unittest.TestCase):
 
         self.assertEqual(LANGUAGE_CHOICES, tuple(SUPPORTED_LANGUAGES.keys()))
         # Spot-check newly exposed languages (issue #565 and catalog expansion).
-        for lang in ["auto", "en-us", "hu", "ja", "ko", "ar", "nl", "pl", "uk"]:
+        for lang in ["auto", "en-us", "hu", "ja", "ko", "ar", "nl", "pl", "sl", "uk"]:
             self.assertIn(lang, LANGUAGE_CHOICES)
             with patch("sys.argv", ["vocalinux", "--language", lang]):
                 args = parse_arguments()

tests/test_speech_recognition.py

@@ -305,6 +305,18 @@ class TestSpeechRecognition(unittest.TestCase):
         self.assertIsNone(hu["vosk"])
         self.assertNotIn("hu", VOSK_MODEL_INFO["small"]["languages"])
 
+    def test_slovenian_is_whisper_only_in_catalog(self) -> None:
+        """Slovenian (issue #970) is exposed for Whisper engines, not VOSK or Slovak."""
+        from vocalinux.utils.vosk_model_info import SUPPORTED_LANGUAGES
+
+        slovenian = SUPPORTED_LANGUAGES["sl"]
+        self.assertEqual(slovenian["name"], "Slovenian")
+        self.assertEqual(slovenian["whisper"], "sl")
+        self.assertIsNone(slovenian["vosk"])
+        for size in ("small", "medium", "large"):
+            self.assertNotIn("sl", VOSK_MODEL_INFO[size]["languages"])
+        self.assertNotIn("sk", SUPPORTED_LANGUAGES)
+
     def test_resolve_whisper_language_maps_english_variants(self):
         """Catalog ids like en-us/en-in must become Whisper's 'en' code."""
         from unittest.mock import patch
@@ -314,6 +326,7 @@ class TestSpeechRecognition(unittest.TestCase):
         self.assertEqual(resolve_whisper_language("en-us"), "en")
         self.assertEqual(resolve_whisper_language("en-in"), "en")
         self.assertEqual(resolve_whisper_language("hu"), "hu")
+        self.assertEqual(resolve_whisper_language("sl"), "sl")
         self.assertEqual(resolve_whisper_language("ja"), "ja")
         self.assertIsNone(resolve_whisper_language("auto"))
         # Unknown catalog ids pass through unchanged.

tests/test_system_language.py

@@ -24,6 +24,8 @@ def isolated_config(tmp_path, monkeypatch):
         ("de", "de"),
         ("cz", "cs"),
         ("se", "sv"),
+        ("si", "sl"),
+        ("sk", None),
         ("us", "en-us"),
         ("gb", "en-us"),
         ("xyz", None),
@@ -48,6 +50,8 @@ def test_layouts_map_onto_catalogue_entries(layout, expected):
         ("nb_NO", "no"),
         ("nb_NO.UTF-8", "no"),
         ("nn_NO", "no"),
+        ("sl_SI.UTF-8", "sl"),
+        ("sk_SK.UTF-8", None),
         ("C", None),
         ("POSIX", None),
         ("C.UTF-8", None),