From ff22f25937d646369691cb9816dd3ca9faca1a17 Mon Sep 17 00:00:00 2001
From: Linux User <fswiai@stuve.stuve-bamberg.de>
Date: Sat, 13 Feb 2021 10:16:30 +0100
Subject: [PATCH] Read preferences also from browser and VC settings

---
 bilingual.js | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/bilingual.js b/bilingual.js
index 5bf8146..0b9b1dd 100644
--- a/bilingual.js
+++ b/bilingual.js
@@ -167,12 +167,22 @@ function getClassNameForLanguage(language) {
 
 /**
  * Read the user's language preference—if any—from LocalStorage and update elements accordingly.
+ * In case there is no LocalStorage entry, but the user selected English as its default VC or browser
+ * language, the `currentLanguage` is set to English.
  */
 function readUserPreferences() {
-  if (localStorage.getItem(STORAGE_LANGUAGE_PREFERENCE_KEY) != null) {
+  const localStorageEntry = localStorage.getItem(STORAGE_LANGUAGE_PREFERENCE_KEY);
+  const documentLanguage = document.querySelector('html').getAttribute('lang');
+  
+  if (localStorageEntry != null) {
     currentLanguage = localStorage.getItem(STORAGE_LANGUAGE_PREFERENCE_KEY);
     updateMultiLanguageElements();
     document.body.classList.add(`wiai-language-${currentLanguage}`);
+  } else if (documentLanguage === 'en' || documentLanguage === 'en_us'
+    || navigator.language === 'en' || navigator.language.includes('en-')) {
+    currentLanguage = 'english';
+    updateMultiLanguageElements();
+    document.body.classList.add(`wiai-language-${currentLanguage}`);
   }
 }