diff --git a/src/main/java/org/meeuw/i18n/languages/DisplayNames_en.java b/src/main/java/org/meeuw/i18n/languages/DisplayNames.java
similarity index 83%
rename from src/main/java/org/meeuw/i18n/languages/DisplayNames_en.java
rename to src/main/java/org/meeuw/i18n/languages/DisplayNames.java
index 797628a..f617fa4 100644
--- a/src/main/java/org/meeuw/i18n/languages/DisplayNames_en.java
+++ b/src/main/java/org/meeuw/i18n/languages/DisplayNames.java
@@ -2,7 +2,7 @@
 
 import java.util.stream.Stream;
 
-public class DisplayNames_en extends java.util.ListResourceBundle {
+public class DisplayNames extends java.util.ListResourceBundle {
     @Override
     protected Object[][] getContents() {
         return Stream.concat(
diff --git a/src/main/java/org/meeuw/i18n/languages/ISO_639_Code.java b/src/main/java/org/meeuw/i18n/languages/ISO_639_Code.java
index 0098a7e..854cfd6 100644
--- a/src/main/java/org/meeuw/i18n/languages/ISO_639_Code.java
+++ b/src/main/java/org/meeuw/i18n/languages/ISO_639_Code.java
@@ -56,15 +56,11 @@ static ISO_639_Code fromCode(String code) {
         return ISO_639.iso639(code);
     }
 
-    ResourceBundle DEFAULT = ResourceBundle.getBundle("org.meeuw.i18n.languages.DisplayNames", Locale.US);
+
 
     default String getDisplayName(Locale locale) {
         ResourceBundle bundle =  ResourceBundle.getBundle("org.meeuw.i18n.languages.DisplayNames", locale);
-        if (bundle.containsKey(code())) {
-            return bundle.getString(code());
-        } else {
-            return DEFAULT.getString(code());
-        }
+        return bundle.getString(code());
 
     }
 
diff --git a/src/test/java/org/meeuw/i18n/languages/test/LanguageCodeTest.java b/src/test/java/org/meeuw/i18n/languages/test/LanguageCodeTest.java
index 8e391b8..382d6ba 100644
--- a/src/test/java/org/meeuw/i18n/languages/test/LanguageCodeTest.java
+++ b/src/test/java/org/meeuw/i18n/languages/test/LanguageCodeTest.java
@@ -219,7 +219,7 @@ public void deprecated() {
 
     @Test
     public void dutchSignLanguage() {
-        LanguageCode l = LanguageCode.get("sse").orElseThrow();
+        LanguageCode l = LanguageCode.get("dse").orElseThrow();
 
         assertThat(l.refName()).isEqualTo("Dutch Sign Language");
         assertThat(l.nameRecord().print()).isEqualTo("dse (Dutch Sign Language)");