diff --git a/fda-units-service/app.py b/fda-units-service/app.py
index 36f94de0c545325ca02a20c3f751fda12e46943e..ea06cd0997c94a557968ef3a540e1920f48ee5ab 100644
--- a/fda-units-service/app.py
+++ b/fda-units-service/app.py
@@ -40,13 +40,12 @@ def suggest():
     try:
         unit = str(input_json['ustring'])
         offset = int(input_json['offset'])
-        res = list_units(unit,offset)
-        return jsonify(res),200
+        res = list_units(stringmapper(unit),offset)
+        return jsonify(res), 200
     except Exception as e:
         print(e)
-        #str(print_exc())
-        res = {"success": False, "message": "Unknown error"+str(e)+unit}
-        return jsonify(res)
+        res = {"success": False, "message": str(e)}
+        return jsonify(res), 500
 
 @app.route('/api/units/validate', methods=["POST"], endpoint='validate')
 @swag_from('validate.yml')
@@ -55,10 +54,11 @@ def valitate():
     try:
         unit = str(input_json['ustring'])
         res = validator(stringmapper(unit))
+        return str(res), 200
     except Exception as e:
         print(e)
-        res = {"success": False, "message": "Unknown error"+str(e)+unit}
-    return jsonify(res)
+        res = {"success": False, "message": str(e)}
+        return jsonify(res)
 
 @app.route('/api/units/geturi', methods=["POST"], endpoint='geturi')
 @swag_from('geturi.yml')
@@ -67,10 +67,11 @@ def geturi():
     try:
         name = str(input_json['uname'])
         res = get_uri(name)
+        return jsonify(res), 200
     except Exception as e:
         print(e)
-        res = {"success": False, "message": "Unknown error"+str(e)+unit}
-    return jsonify(res)
+        res = {"success": False, "message": str(e)}
+        return jsonify(res), 500
 
 rest_server_port = 5010
 eureka_client.init(eureka_server=os.getenv('EUREKA_SERVER', 'http://localhost:9090/eureka/'),
diff --git a/fda-units-service/list.py b/fda-units-service/list.py
index cbfaaf6c462397afabd186f9fd4a136d9efe5973..ee96da0e69dc46447d62e3016ced8c1ad5e6c303 100644
--- a/fda-units-service/list.py
+++ b/fda-units-service/list.py
@@ -18,14 +18,14 @@ rdf_schema = rdflib.Namespace('http://www.w3.org/2000/01/rdf-schema#')
 r={}
 
 def list_units(string,offset=0):
-    if bool(re.match('^[a-zA-Z0-9]+$',string)):
+    if bool(re.match('^[a-zA-Z0-9\\s]+$',string)):
         l_query = """
         SELECT ?symbol ?name ?comment
         WHERE {
             ?unit om:symbol ?symbol .
             ?unit <http://www.w3.org/2000/01/rdf-schema#label> ?name .
             ?unit <http://www.w3.org/2000/01/rdf-schema#comment> ?comment .
-            FILTER regex(str(?unit),\""""+string+"""\","i")
+            FILTER (regex(str(?unit),\""""+string+"""\","i") && lang(?name)="en")
             } LIMIT 10 OFFSET """+str(offset)
         qres = g.query(l_query)
         units = list()
diff --git a/fda-units-service/validate.py b/fda-units-service/validate.py
index 7ca56a055be356a1a091c41d104bc40effbeb4ec..215155387f152359f202df70e9fa5583f8057424 100644
--- a/fda-units-service/validate.py
+++ b/fda-units-service/validate.py
@@ -16,10 +16,10 @@ def validator(value):
     #input str
     tmp = str(om)+value
     t_uri = rdflib.term.URIRef(tmp)
-    if next(g.triples((t_uri,None,om.Unit)), _exhausted) is _exhausted and next(g.triples((t_uri,None,om.PrefixedUnit)),_exhausted) is _exhausted and next(g.triples((t_uri,None,om.UnitDivision)),_exhausted) is _exhausted:
-        return {"valid": False}
+    if next(g.triples((t_uri,None,om.Unit)), _exhausted) is _exhausted and next(g.triples((t_uri,None,om.PrefixedUnit)),_exhausted) is _exhausted and next(g.triples((t_uri,None,None)),_exhausted) is _exhausted:
+        return False
     else:
-        return {"valid": True}
+        return True
 
 def stringmapper(thisstring):
     if ' ' in thisstring: