diff --git a/extensions/wikidata/module/langs/translation-en.json b/extensions/wikidata/module/langs/translation-en.json
index 66cf8f014..9e32dfd41 100644
--- a/extensions/wikidata/module/langs/translation-en.json
+++ b/extensions/wikidata/module/langs/translation-en.json
@@ -24,7 +24,7 @@
                 },
                 "new-item-without-descriptions": {
                         "title": "Some new items will be created without any description.",
-                        "body": "Adding descriptions will make it easier to disambiguate them from namesakes."
+                        "body": "Adding descriptions will make it easier to disambiguate the items from namesakes."
                 },
                "new-item-with-deleted-statements": {
                         "title": "You are trying to delete statements on new items.",
@@ -37,6 +37,14 @@
                 "statement-without-reference": {
                         "title": "Some statements are not referenced.",
                         "body": "Please provide references for the statements that you add."
+                },
+                "add-statements-with-invalid-format": {
+                        "title": "Invalid format for some text statements.",
+                        "body": "Please consult the documentation of the properties to find out the correct format for their values."
+                },
+                "remove-statements-with-invalid-format": {
+                        "title": "Statements with invalid format will be removed.",
+                        "body": "If these statements currently exist on Wikidata, this will solve constraint violations."
                 }
        }
 }
diff --git a/extensions/wikidata/src/org/openrefine/wikidata/qa/EditInspector.java b/extensions/wikidata/src/org/openrefine/wikidata/qa/EditInspector.java
index cf09be4e0..59b8016b5 100644
--- a/extensions/wikidata/src/org/openrefine/wikidata/qa/EditInspector.java
+++ b/extensions/wikidata/src/org/openrefine/wikidata/qa/EditInspector.java
@@ -5,6 +5,8 @@ import java.util.List;
 import java.util.Map;
 
 import org.openrefine.wikidata.qa.scrutinizers.EditScrutinizer;
+import org.openrefine.wikidata.qa.scrutinizers.FormatConstraintScrutinizer;
+import org.openrefine.wikidata.qa.scrutinizers.InverseConstraintScrutinizer;
 import org.openrefine.wikidata.qa.scrutinizers.NewItemScrutinizer;
 import org.openrefine.wikidata.schema.ItemUpdate;
 
@@ -23,6 +25,7 @@ public class EditInspector {
         
         // Register all known scrutinizers here
         register(new NewItemScrutinizer());
+        register(new FormatConstraintScrutinizer());
     }
     
     /**
diff --git a/extensions/wikidata/src/org/openrefine/wikidata/qa/scrutinizers/FormatConstraintScrutinizer.java b/extensions/wikidata/src/org/openrefine/wikidata/qa/scrutinizers/FormatConstraintScrutinizer.java
new file mode 100644
index 000000000..66b6f8d51
--- /dev/null
+++ b/extensions/wikidata/src/org/openrefine/wikidata/qa/scrutinizers/FormatConstraintScrutinizer.java
@@ -0,0 +1,60 @@
+package org.openrefine.wikidata.qa.scrutinizers;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.regex.Pattern;
+
+import org.openrefine.wikidata.qa.ConstraintFetcher;
+import org.wikidata.wdtk.datamodel.interfaces.Snak;
+import org.wikidata.wdtk.datamodel.interfaces.StringValue;
+
+
+public class FormatConstraintScrutinizer extends SnakScrutinizer {
+    
+    private Map<String, Pattern> _patterns;
+    private ConstraintFetcher _fetcher;
+    
+    public FormatConstraintScrutinizer() {
+        _patterns = new HashMap<>();
+        _fetcher = new ConstraintFetcher();
+    }
+    
+    /**
+     * Loads the regex for a property and compiles it to a pattern
+     * (this is cached upstream, plus we are doing it only once per
+     * property and batch).
+     * @param pid the id of the property to fetch the constraints for
+     * @return
+     */
+    protected Pattern getPattern(String pid) {
+        if(_patterns.containsKey(pid)) {
+            return _patterns.get(pid);
+        } else {
+            String regex = _fetcher.getFormatRegex(pid);
+            Pattern pattern = null;
+            if (regex != null) {
+                pattern = Pattern.compile(regex);
+            }
+            _patterns.put(pid, pattern);
+            return pattern;
+        }
+    }
+
+    @Override
+    public void scrutinize(Snak snak, boolean added) {
+        if(StringValue.class.isInstance(snak.getValue())) {
+            String value = ((StringValue) snak.getValue()).getString();
+            String pid = snak.getPropertyId().getId();
+            Pattern pattern = getPattern(pid);
+            if (!pattern.matcher(value).matches()) {
+                if (added) {
+                    important("add-statements-with-invalid-format");
+                } else {
+                    info("remove-statements-with-invalid-format");
+                }
+            }
+        }
+
+    }
+
+}