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diff --git a/src/pretix/control/static/pretixcontrol/less/flags.less b/src/pretix/control/static/pretixcontrol/less/flags.less
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--- /dev/null
+++ b/src/pretix/control/static/pretixcontrol/less/flags.less
@@ -0,0 +1,251 @@
+input[data-lang] {
+  background: no-repeat 10px center;
+  padding-left: 34px;
+}
+textarea[data-lang] {
+  background: no-repeat 10px 10px;
+  padding-left: 34px;
+}
+input[data-lang=ad], textarea[data-lang=ad] { background-image: url('../img/flags/ad.png'); }
+input[data-lang=ae], textarea[data-lang=ae] { background-image: url('../img/flags/ae.png'); }
+input[data-lang=af], textarea[data-lang=af] { background-image: url('../img/flags/af.png'); }
+input[data-lang=ag], textarea[data-lang=ag] { background-image: url('../img/flags/ag.png'); }
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+input[data-lang=aw], textarea[data-lang=aw] { background-image: url('../img/flags/aw.png'); }
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+input[data-lang=tz], textarea[data-lang=tz] { background-image: url('../img/flags/tz.png'); }
+input[data-lang=ua], textarea[data-lang=ua] { background-image: url('../img/flags/ua.png'); }
+input[data-lang=ug], textarea[data-lang=ug] { background-image: url('../img/flags/ug.png'); }
+input[data-lang=um], textarea[data-lang=um] { background-image: url('../img/flags/um.png'); }
+input[data-lang=us], textarea[data-lang=us] { background-image: url('../img/flags/us.png'); }
+input[data-lang=uy], textarea[data-lang=uy] { background-image: url('../img/flags/uy.png'); }
+input[data-lang=uz], textarea[data-lang=uz] { background-image: url('../img/flags/uz.png'); }
+input[data-lang=va], textarea[data-lang=va] { background-image: url('../img/flags/va.png'); }
+input[data-lang=vc], textarea[data-lang=vc] { background-image: url('../img/flags/vc.png'); }
+input[data-lang=ve], textarea[data-lang=ve] { background-image: url('../img/flags/ve.png'); }
+input[data-lang=vg], textarea[data-lang=vg] { background-image: url('../img/flags/vg.png'); }
+input[data-lang=vi], textarea[data-lang=vi] { background-image: url('../img/flags/vi.png'); }
+input[data-lang=vn], textarea[data-lang=vn] { background-image: url('../img/flags/vn.png'); }
+input[data-lang=vu], textarea[data-lang=vu] { background-image: url('../img/flags/vu.png'); }
+input[data-lang=wf], textarea[data-lang=wf] { background-image: url('../img/flags/wf.png'); }
+input[data-lang=ws], textarea[data-lang=ws] { background-image: url('../img/flags/ws.png'); }
+input[data-lang=ye], textarea[data-lang=ye] { background-image: url('../img/flags/ye.png'); }
+input[data-lang=yt], textarea[data-lang=yt] { background-image: url('../img/flags/yt.png'); }
+input[data-lang=za], textarea[data-lang=za] { background-image: url('../img/flags/za.png'); }
+input[data-lang=zm], textarea[data-lang=zm] { background-image: url('../img/flags/zm.png'); }
+input[data-lang=zw], textarea[data-lang=zw] { background-image: url('../img/flags/zw.png'); }
+
+input[data-lang=en], textarea[data-lang=en] { background-image: url('../img/flags/gb.png'); }
diff --git a/src/pretix/control/static/pretixcontrol/less/forms.less b/src/pretix/control/static/pretixcontrol/less/forms.less
index 8d854c7a2f..f157494218 100644
--- a/src/pretix/control/static/pretixcontrol/less/forms.less
+++ b/src/pretix/control/static/pretixcontrol/less/forms.less
@@ -75,4 +75,4 @@ td > .form-group > .checkbox {
             margin-top: 10px;
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/pretix/control/static/pretixcontrol/less/main.less b/src/pretix/control/static/pretixcontrol/less/main.less
index 1fea2841fa..9da33b3574 100644
--- a/src/pretix/control/static/pretixcontrol/less/main.less
+++ b/src/pretix/control/static/pretixcontrol/less/main.less
@@ -5,6 +5,7 @@
 @import "variables.less";
 @import "sb-admin-2.less";
 @import "forms.less";
+@import "flags.less";
 
 footer {
     text-align: center;