diff --git a/lang/index.json b/lang/index.json
index f2750cd72..2a9ecfd42 100644
--- a/lang/index.json
+++ b/lang/index.json
@@ -10,11 +10,11 @@
   {"code":"nl_NL","name":"Dutch","url":"nl_NL.json"},
   {"code":"sv_SE","name":"Swedish","url":"sv_SE.json"},
   {"code":"tr_TR","name":"Turkish","url":"tr_TR.json"},
-  {"code":"ru_RU","name":"Russian","url":"ru_RU.json"},
+  {"code":"ru_RU","name":"Russian","url":"ru_RU.json", "disabled":"Characters not in ISO Latin codepage"},
   {"code":"pt_PT","name":"Portuguese","url":"pt_PT.json"},
-  {"code":"bg_BG","name":"Bulgarian","url":"bg_BG.json"},
+  {"code":"bg_BG","name":"Bulgarian","url":"bg_BG.json", "disabled":"Characters not in ISO Latin codepage"},
   {"code":"da_DA","name":"Danish","url":"da_DA.json"},
-  {"code":"el_EL","name":"Greek","url":"el_EL.json"},
+  {"code":"el_EL","name":"Greek","url":"el_EL.json", "disabled":"Characters not in ISO Latin codepage"},
   {"code":"et_ET","name":"Estonian","url":"et_ET.json"},
   {"code":"lt_LT","name":"Lithuanian","url":"lt_LT.json"},
   {"code":"lv_LV","name":"Latvian","url":"lv_LV.json"},
diff --git a/loader.js b/loader.js
index c6840cbb0..6b27736ae 100644
--- a/loader.js
+++ b/loader.js
@@ -179,6 +179,7 @@ window.addEventListener('load', (event) => {
     } catch(e) {
       console.error("lang/index.json Corrupted", e);
     }
+    languages = languages.filter( l=> l.disabled===undefined );
 
     function reloadLanguage() {
       LANGUAGE = undefined;