Use explicit widget language code

server.js

@@ -1163,11 +1163,7 @@ function widgetLanguageForRequest(site, url) {
   const settings = parseJson(site.settings_json, defaultSettings());
   const languageSettings = normalizeWidgetLanguageSettings(settings.widgetLanguage);
   if (languageSettings.mode === "fixed") return languageSettings.fixedLanguage;
-  return allowedWidgetLanguage(url.searchParams.get("lang"))
-    || allowedWidgetLanguage(url.searchParams.get("pageLang"))
-    || languageFromUrl(url.searchParams.get("currentUrl"))
-    || allowedWidgetLanguage(url.searchParams.get("browserLang"))
-    || languageSettings.fallbackLanguage;
+  return allowedWidgetLanguage(url.searchParams.get("lang")) || languageSettings.defaultLanguage;
 }
 
 async function widgetCopyForLanguage(site, requestedLanguage) {
@@ -1250,14 +1246,6 @@ function syncLegacyWidgetCopy(settings) {
   }
 }
 
-function languageFromUrl(value) {
-  try {
-    return allowedWidgetLanguage(new URL(value).pathname.split("/").filter(Boolean)[0]);
-  } catch {
-    return "";
-  }
-}
-
 function allowedWidgetLanguage(value) {
   const language = normalizeLanguage(value);
   return EUROPEAN_WIDGET_LANGUAGES.has(language) ? language : "";
@@ -1517,9 +1505,13 @@ function formatSite(site) {
 }
 
 function snippetFor(site) {
+  const settings = parseJson(site.settings_json, defaultSettings());
+  const languageSettings = normalizeWidgetLanguageSettings(settings.widgetLanguage);
+  const snippetLanguage = languageSettings.defaultLanguage || "cs";
   return `<script>
   window.MaalFlows = {
     siteKey: "${site.site_key}",
+    lang: "${snippetLanguage}",
     apiBase: "${PUBLIC_BASE_URL}"
   };
 </script>