diff --git a/core/checker.js b/core/checker.js
index 91fbe0b..9414e9f 100644
--- a/core/checker.js
+++ b/core/checker.js
@@ -404,7 +404,7 @@ exports.checker = async () => {
     checkType(config.languagefile,"string","languagefile")
     const lf = config.languagefile
     
-    if (!lf.startsWith("custom") && !lf.startsWith("english") && !lf.startsWith("dutch") && !lf.startsWith("romanian") && !lf.startsWith("german") && !lf.startsWith("arabic") && !lf.startsWith("spanish") && !lf.startsWith("portuguese") && !lf.startsWith("french") && !lf.startsWith("italian")){
+    if (!lf.startsWith("custom") && !lf.startsWith("english") && !lf.startsWith("dutch") && !lf.startsWith("romanian") && !lf.startsWith("german") && !lf.startsWith("arabic") && !lf.startsWith("spanish") && !lf.startsWith("portuguese") && !lf.startsWith("french") && !lf.startsWith("italian") && !lf.startsWith("czech") && !lf.startsWith("danish")){
         createError("'languagefile' | invalid language, more info in the wiki")
     }