Issue 4833 - Add translations for invalid filter messages

locale/en-US/filter.json

Index: locale/en-US/filter.json
diff --git a/locale/en-US/filter.json b/locale/en-US/filter.json
new file mode 100644
index 0000000000000000000000000000000000000000..ff709770b9c4d6408375274749c509667b608312
--- /dev/null
+++ b/locale/en-US/filter.json
@@ -0,0 +1,20 @@
+{
+  "filter_elemhide_duplicate_id": {
+    "message": "Only one ID of the element to be hidden can be specified"
+  },
+  "filter_elemhideemulation_nodomain": {
+    "message": "No active domain specified for extended element hiding filter"
+  },
+  "filter_elemhide_nocriteria": {
+    "message": "No criteria specified to recognize the element to be hidden"
+  },
+  "filter_invalid_regexp": {
+    "message": "Invalid regular expression"
+  },
+  "filter_regexp_tooltip": {
+    "message": "This filter is either a regular expression or too short to be optimized. Too many of these filters might slow down your browsing."
+  },
+  "filter_unknown_option": {
+    "message": "Unknown filter option"
+  }
+}