Simplify widget language settings

server.js

@@ -299,9 +299,7 @@ function defaultSettings() {
   return {
     widgetLanguage: {
       mode: "auto",
-      defaultLanguage: "cs",
-      fixedLanguage: "cs",
-      fallbackLanguage: "cs"
+      defaultLanguage: "cs"
     },
     widgetCopy,
     title: { cs: widgetCopy.cs.title, en: widgetCopy.en.title },
@@ -1096,12 +1094,11 @@ function mergeSiteSettings(currentSettings, incomingSettings) {
 function normalizeWidgetLanguageSettings(value) {
   const defaults = defaultSettings().widgetLanguage;
   const settings = { ...defaults, ...(value || {}) };
-  const mode = settings.mode === "fixed" ? "fixed" : "auto";
+  const mode = settings.mode === "fixed" || settings.mode === "default" ? "default" : "auto";
+  const defaultLanguage = allowedWidgetLanguage(settings.defaultLanguage || settings.fixedLanguage || settings.fallbackLanguage) || defaults.defaultLanguage;
   return {
     mode,
-    defaultLanguage: allowedWidgetLanguage(settings.defaultLanguage) || defaults.defaultLanguage,
-    fixedLanguage: allowedWidgetLanguage(settings.fixedLanguage) || defaults.fixedLanguage,
-    fallbackLanguage: allowedWidgetLanguage(settings.fallbackLanguage) || allowedWidgetLanguage(settings.defaultLanguage) || defaults.fallbackLanguage
+    defaultLanguage
   };
 }
 
@@ -1162,7 +1159,7 @@ function getTranslationSettings() {
 function widgetLanguageForRequest(site, url) {
   const settings = parseJson(site.settings_json, defaultSettings());
   const languageSettings = normalizeWidgetLanguageSettings(settings.widgetLanguage);
-  if (languageSettings.mode === "fixed") return languageSettings.fixedLanguage;
+  if (languageSettings.mode === "default") return languageSettings.defaultLanguage;
   return allowedWidgetLanguage(url.searchParams.get("lang")) || languageSettings.defaultLanguage;
 }
 
@@ -1171,12 +1168,10 @@ async function widgetCopyForLanguage(site, requestedLanguage) {
   settings.widgetLanguage = normalizeWidgetLanguageSettings(settings.widgetLanguage);
   settings.widgetCopy = normalizeWidgetCopy(settings.widgetCopy || {}, settings);
 
-  const language = allowedWidgetLanguage(requestedLanguage) || settings.widgetLanguage.fallbackLanguage;
+  const language = allowedWidgetLanguage(requestedLanguage) || settings.widgetLanguage.defaultLanguage;
   if (settings.widgetCopy[language]) return { language, copy: settings.widgetCopy[language] };
 
-  const fallbackLanguage = settings.widgetCopy[settings.widgetLanguage.fallbackLanguage]
-    ? settings.widgetLanguage.fallbackLanguage
-    : settings.widgetLanguage.defaultLanguage;
+  const fallbackLanguage = settings.widgetLanguage.defaultLanguage;
   const fallbackCopy = settings.widgetCopy[fallbackLanguage] || defaultWidgetCopy("cs");
   const translated = await translateWidgetCopyOnce(fallbackCopy, fallbackLanguage, language);
   if (!translated) return { language: fallbackLanguage, copy: fallbackCopy };