diff --git a/js/id/ui/preset/localized.js b/js/id/ui/preset/localized.js
index c7d0e99b0..f8d55e9ff 100644
--- a/js/id/ui/preset/localized.js
+++ b/js/id/ui/preset/localized.js
@@ -209,11 +209,11 @@ iD.ui.preset.localized = function(field, context) {
 
         input.value(tags[field.key] || '');
 
-        var postfixed = [];
-        for (var i in tags) {
-            var m = i.match(new RegExp(field.key + ':([a-zA-Z_-]+)$'));
-            if (m && m[1]) {
-                postfixed.push({ lang: m[1], value: tags[i]});
+        var postfixed = [], k, m;
+        for (k in tags) {
+            m = k.match(/^(.*):([a-zA-Z_-]+)$/);
+            if (m && m[1] === field.key && m[2]) {
+                postfixed.push({ lang: m[2], value: tags[k] });
             }
         }
 
diff --git a/test/spec/ui/preset/localized.js b/test/spec/ui/preset/localized.js
index d02a0dc1a..fb412548f 100644
--- a/test/spec/ui/preset/localized.js
+++ b/test/spec/ui/preset/localized.js
@@ -89,6 +89,15 @@ describe('iD.ui.preset.localized', function() {
         happen.once(selection.selectAll('.localized-lang').node(), {type: 'change'});
     });
 
+    it("ignores similar keys like `old_name`", function() {
+        var localized = iD.ui.preset.localized(field, {});
+        selection.call(localized);
+        localized.tags({'old_name:de': 'Value'});
+
+        expect(selection.selectAll('.localized-lang').empty()).to.be.ok;
+        expect(selection.selectAll('.localized-value').empty()).to.be.ok;
+    });
+
     it("removes the tag when the language is emptied", function() {
         var localized = iD.ui.preset.localized(field, {});
         selection.call(localized);