diff --git a/htdocs/langs/en_US/languages.lang b/htdocs/langs/en_US/languages.lang
index 4e4b2cfafe7..78378c6c5d3 100644
--- a/htdocs/langs/en_US/languages.lang
+++ b/htdocs/langs/en_US/languages.lang
@@ -23,6 +23,7 @@ Language_da_DK=Danish
 Language_de_DE=German
 Language_de_AT=German (Austria)
 Language_de_CH=German (Switzerland)
+Language_de_LU=German (Luxembourg)
 Language_el_GR=Greek
 Language_el_CY=Greek (Cyprus)
 Language_en_AE=English (United Arab Emirates)