One language setting; localized in-memory speech per language

ackit/texts.py

@@ -52,10 +52,11 @@ class Texts:
         self.subtitles(lang)
         return self._subs[lang][1].get(key, [])
 
-    def for_sound(self, sound):
-        """Subtitle lines of a speech sound in its own language (or the INT line for other languages)."""
-        lang = sound.archive if sound.archive in self.subtitle_languages() else None
-        if not lang:
+    def for_sound(self, sound, lang=None):
+        """Subtitle lines of a speech sound, in `lang` (default: the sound's own language). Languages without
+        their own voices link their subtitles to the INT sounds, so e.g. JPN subtitles are found for INT lines."""
+        lang = lang or sound.language or sound.archive
+        if lang not in self.subtitle_languages():
             return []
         return [s for s in self.subtitles(lang) if s.sound == sound.key]