Use explicit widget language code

public/widget.js

@@ -2,7 +2,7 @@
   const boot = window.MaalFlows || {};
   const apiBase = (boot.apiBase || "").replace(/\/$/, "") || new URL(document.currentScript.src).origin;
   const siteKey = boot.siteKey || "9b-plus";
-  const lang = detectPageLanguage(boot);
+  const lang = normalizeLanguage(boot.lang);
   const storageKey = `maalflows:${siteKey}`;
   const pendingStorageKey = `${storageKey}:pending`;
   const session = loadSession();
@@ -13,10 +13,7 @@
 
   fetch(`${apiBase}/api/widget/config?${new URLSearchParams({
     siteKey,
-    lang,
-    pageLang: document.documentElement.lang || "",
-    currentUrl: location.href,
-    browserLang: navigator.language || ""
+    lang
   })}`)
     .then((res) => res.json())
     .then((config) => mount(config))
@@ -506,16 +503,6 @@
     };
   }
 
-  function detectPageLanguage(boot) {
-    const fromBoot = normalizeLanguage(boot.lang);
-    if (fromBoot) return fromBoot;
-    const fromUrl = normalizeLanguage(location.pathname.split("/").filter(Boolean)[0]);
-    if (fromUrl) return fromUrl;
-    const fromHtml = normalizeLanguage(document.documentElement.lang);
-    if (fromHtml) return fromHtml;
-    return normalizeLanguage(navigator.language) || "cs";
-  }
-
   function normalizeLanguage(value) {
     const text = String(value || "").trim().toLowerCase().replace("_", "-");
     const match = text.match(/^[a-z]{2,3}/);

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>