One language setting; localized in-memory speech per language

tests/test_app.py

@@ -97,7 +97,7 @@ def test_bank_sound_apply_revert_in_editor(win, tmp_path):
     w, root, originals = win
     before = files(root)
     w.cmb_arch.setCurrentText("BANK")
-    assert w.proxy.rowCount() == 6
+    assert w.proxy.rowCount() == 7                                  # 6 neutral + the INT copy of a localized line
     assert w.select_name("CHR_SynthFoley_1")
     ed = w.editor
     assert "bank CHR_SynthFoley (2 copies)" in ed.meta.text()
@@ -116,7 +116,7 @@ def test_subtitles_tab_edit_and_link(win):
     before = files(root)
     w.tabs.setCurrentWidget(w.subs)
     p = w.subs
-    assert p.lang == "INT" and p.model.rowCount() == 2
+    assert p.lang == "INT" and p.model.rowCount() == 3
     p.search.setText("scanner")
     p._filter()
     assert p.proxy.rowCount() == 1
@@ -141,6 +141,22 @@ def test_subtitles_tab_edit_and_link(win):
     assert files(root) == before and not w.ws.texts.records()
 
 
+def test_one_language_for_everything(win):
+    w, root, _ = win
+    assert w.language == "INT" and w.cmb_lang.currentText() == "INT" and not w.lbl_voices.text()
+    assert {"INT", "ITA", "RUS"} <= {w.cmb_lang.itemText(i) for i in range(w.cmb_lang.count())}
+    w.load_game(root, "RUS")                                  # no Russian voices: INT speech, RUS texts
+    assert w.language == "RUS" and "voices: INT" in w.lbl_voices.text()
+    assert "INT" in w.ws.catalog.archives
+    w.tabs.setCurrentWidget(w.subs)
+    assert w.subs.lang == "RUS" and "RUS" in w.subs.lbl_lang.text()
+    w.tabs.setCurrentIndex(0)
+    w.select_name("CHR_RadioScanner_2")
+    assert [e.text() for e in w.editor.subtitle.edits] == ["Строка два"]
+    w.tabs.setCurrentWidget(w.menu)
+    assert w.menu.lang is None and w.menu.model.rowCount() == 0   # no RUS menu files in the synthetic game
+
+
 def test_subtitles_find_replace(win):
     w, root, _ = win
     before = files(root)