in library/src/main/java/com/whatsapp/stringpacks/StringPacks.java [222:231]
private static String getPackFileName(Locale locale) {
String packFileId = null;
if (stringPacksLocaleMetaDataProvider != null) {
packFileId = stringPacksLocaleMetaDataProvider.getPackFileIdForLocale(locale);
}
if (packFileId == null) {
packFileId = locale.getLanguage();
}
return "strings_" + packFileId;
}