Change "u. a." to "et al." in German citation

Change-Id: Ie911f80ddd4d4de821523f0897719c2982a532d0
diff --git a/styles/ICLC-10.csl b/styles/ICLC-10.csl
index 89a18f0..2c026f0 100644
--- a/styles/ICLC-10.csl
+++ b/styles/ICLC-10.csl
@@ -35,6 +35,7 @@
       </term>
       <term name="editortranslator" form="verb">bearbeitet und übersetzt von</term>
       <term name="edition" form="short">Ausg.</term>
+      <term name="et-al">et al.</term>
       <term name="in">In:</term>
     </terms>
   </locale>