diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/opac.pref b/koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/opac.pref
index 82c0284125..e1c72f0eb9 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/opac.pref
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/opac.pref
@@ -27,7 +27,7 @@ OPAC:
               choices:
                   yes: Enable
                   no: Disable
-            - "Koha OPAC as public. Private OPAC requires authentification before accessing the OPAC."
+            - "Koha OPAC as public. Private OPAC requires authentication before accessing the OPAC."
         -
             - pref: HighlightOwnItemsOnOPAC
               choices:
diff --git a/koha-tmpl/opac-tmpl/bootstrap/en/modules/errors/errorpage.tt b/koha-tmpl/opac-tmpl/bootstrap/en/modules/errors/errorpage.tt
index bfd6275481..b0023d8320 100644
--- a/koha-tmpl/opac-tmpl/bootstrap/en/modules/errors/errorpage.tt
+++ b/koha-tmpl/opac-tmpl/bootstrap/en/modules/errors/errorpage.tt
@@ -48,7 +48,7 @@
                             [% IF ( errno == 404 ) %]
                                 <li>You made use of an external link to a catalog item that is no longer available.</li>
                                 <li>You followed an outdated link e.g. from a search engine or a bookmark.</li>
-                                <li>You tried to access a page that needs authentification.</li>
+                                <li>You tried to access a page that needs authentication.</li>
                                 <li>An internal link in our catalog home page is broken and the page does not exist.</li>
                             [% END %]
                             [% IF ( errno == 500 ) %]