diff --git a/seahub/group/forms.py b/seahub/group/forms.py
index 4a3c6b1aac..1d6ee80ab6 100644
--- a/seahub/group/forms.py
+++ b/seahub/group/forms.py
@@ -33,7 +33,7 @@ class GroupAddForm(forms.Form):
     def clean_group_name(self):
         group_name = self.cleaned_data['group_name']
         if not validate_group_name(group_name):
-            error_msg = _(u'Group name can only contain letters, numbers or underline')
+            error_msg = _(u'Group name can only contain letters, numbers or underscore')
             raise forms.ValidationError(error_msg)
         else:
             return group_name
diff --git a/seahub/templates/base.html b/seahub/templates/base.html
index 043a0ea1a1..6690e5fba2 100644
--- a/seahub/templates/base.html
+++ b/seahub/templates/base.html
@@ -149,7 +149,7 @@
                             <label class="checkbox-label"><span class="checkbox"><input type="checkbox" name="ftype" value="Markdown" class="checkbox-orig" /></span><span class="checkbox-option">{% trans "markdown" %}</span></label>
                             <br/>
                             <input type="text" value="{{ input_fileexts }}" name="input_fexts" placeholder="{% trans "Input file extensions here, separate with ','" %}" class="fileext-input" />
-                            <p class="error hide">{% trans "Please select at least 1 file type or input at least 1 file extension" %}</p>
+                            <p class="error hide">{% trans "Please select at least one file type or input at least one file extension" %}</p>
                         </div>
                     </div>
                     <input type="submit" value="{% trans "Submit" %}" class="submit" />
diff --git a/seahub/templates/repo.html b/seahub/templates/repo.html
index 6fec3ad2be..b9419b1911 100644
--- a/seahub/templates/repo.html
+++ b/seahub/templates/repo.html
@@ -1512,7 +1512,7 @@ $('#mv-dir-list h5').click(function() {
 });
 $('#private-share-form').submit(function() {
     if (!$('[name="emails"]', $(this)).val()) {
-        apply_form_error($(this).attr('id'), "{% trans "Contacts is required." %}");
+        apply_form_error($(this).attr('id'), "{% trans "Contact is required." %}");
         return false;
     }
 });