diff --git a/apa.csl b/apa.csl
index 14a863ca5f..bf43da5547 100644
--- a/apa.csl
+++ b/apa.csl
@@ -92,6 +92,11 @@
       <term name="et-al">et al.</term>
     </terms>
   </locale>
+  <locale xml:lang="pl">
+    <terms>
+      <term name="et-al">i in.</term>
+    </terms>
+  </locale>
   <locale xml:lang="ro">
     <terms>
       <term name="et-al">et al.</term>