diff --git a/src/applications/home/controller/PhabricatorHomeMainController.php b/src/applications/home/controller/PhabricatorHomeMainController.php
--- a/src/applications/home/controller/PhabricatorHomeMainController.php
+++ b/src/applications/home/controller/PhabricatorHomeMainController.php
@@ -190,7 +190,7 @@
     if (!$tasks) {
       return $this->renderMiniPanel(
         pht('No "Needs Triage" Tasks'),
-        pht('No tasks in projects you are a member of need triage.'));
+        pht('No tasks tagged with projects you are a member of need triage.'));
     }
 
     $title = pht('Needs Triage');
diff --git a/src/applications/maniphest/query/ManiphestTaskQuery.php b/src/applications/maniphest/query/ManiphestTaskQuery.php
--- a/src/applications/maniphest/query/ManiphestTaskQuery.php
+++ b/src/applications/maniphest/query/ManiphestTaskQuery.php
@@ -278,8 +278,9 @@
 
       foreach ($tasks as $key => $task) {
         if (!$task->getGroupByProjectPHID()) {
-          // This task is either not in any projects, or only in projects
-          // which we're ignoring because they're being queried for explicitly.
+          // This task is either not tagged with any projects, or only tagged
+          // with projects which we're ignoring because they're being queried
+          // for explicitly.
           continue;
         }
 
@@ -642,14 +643,14 @@
    * Return project PHIDs which we should ignore when grouping tasks by
    * project. For example, if a user issues a query like:
    *
-   *   Tasks in all projects: Frontend, Bugs
+   *   Tasks tagged with all projects: Frontend, Bugs
    *
    * ...then we don't show "Frontend" or "Bugs" groups in the result set, since
    * they're meaningless as all results are in both groups.
    *
    * Similarly, for queries like:
    *
-   *   Tasks in any projects: Public Relations
+   *   Tasks tagged with any projects: Public Relations
    *
    * ...we ignore the single project, as every result is in that project. (In
    * the case that there are several "any" projects, we do not ignore them.)
diff --git a/src/applications/project/engineextension/PhabricatorProjectsEditEngineExtension.php b/src/applications/project/engineextension/PhabricatorProjectsEditEngineExtension.php
--- a/src/applications/project/engineextension/PhabricatorProjectsEditEngineExtension.php
+++ b/src/applications/project/engineextension/PhabricatorProjectsEditEngineExtension.php
@@ -44,13 +44,13 @@
 
     $projects_field = id(new PhabricatorProjectsEditField())
       ->setKey('projectPHIDs')
-      ->setLabel(pht('Projects'))
+      ->setLabel(pht('Tags'))
       ->setEditTypeKey('projects')
-      ->setAliases(array('project', 'projects'))
+      ->setAliases(array('project', 'projects', 'tag', 'tags'))
       ->setIsCopyable(true)
       ->setUseEdgeTransactions(true)
-      ->setCommentActionLabel(pht('Change Projects'))
-      ->setDescription(pht('Select projects for the object.'))
+      ->setCommentActionLabel(pht('Change Project Tags'))
+      ->setDescription(pht('Select project tags for the object.'))
       ->setTransactionType($edge_type)
       ->setMetadataValue('edge:type', $project_edge_type)
       ->setValue($project_phids);
@@ -58,14 +58,14 @@
     $projects_field->setViewer($engine->getViewer());
 
     $edit_add = $projects_field->getConduitEditType('projects.add')
-      ->setConduitDescription(pht('Add projects.'));
+      ->setConduitDescription(pht('Add project tags.'));
 
     $edit_set = $projects_field->getConduitEditType('projects.set')
       ->setConduitDescription(
-        pht('Set projects, overwriting current value.'));
+        pht('Set project tags, overwriting current value.'));
 
     $edit_rem = $projects_field->getConduitEditType('projects.remove')
-      ->setConduitDescription(pht('Remove projects.'));
+      ->setConduitDescription(pht('Remove project tags.'));
 
     return array(
       $projects_field,
diff --git a/src/applications/project/engineextension/PhabricatorProjectsSearchEngineExtension.php b/src/applications/project/engineextension/PhabricatorProjectsSearchEngineExtension.php
--- a/src/applications/project/engineextension/PhabricatorProjectsSearchEngineExtension.php
+++ b/src/applications/project/engineextension/PhabricatorProjectsSearchEngineExtension.php
@@ -41,10 +41,10 @@
     $fields[] = id(new PhabricatorProjectSearchField())
       ->setKey('projectPHIDs')
       ->setConduitKey('projects')
-      ->setAliases(array('project', 'projects'))
-      ->setLabel(pht('Projects'))
+      ->setAliases(array('project', 'projects', 'tag', 'tags'))
+      ->setLabel(pht('Tags'))
       ->setDescription(
-        pht('Search for objects associated with given projects.'));
+        pht('Search for objects tagged with given projects.'));
 
     return $fields;
   }
diff --git a/src/applications/project/typeahead/PhabricatorProjectNoProjectsDatasource.php b/src/applications/project/typeahead/PhabricatorProjectNoProjectsDatasource.php
--- a/src/applications/project/typeahead/PhabricatorProjectNoProjectsDatasource.php
+++ b/src/applications/project/typeahead/PhabricatorProjectNoProjectsDatasource.php
@@ -4,11 +4,11 @@
   extends PhabricatorTypeaheadDatasource {
 
   public function getBrowseTitle() {
-    return pht('Browse Not In Any Projects');
+    return pht('Browse Not Tagged With Any Projects');
   }
 
   public function getPlaceholderText() {
-    return pht('Type "not in any projects"...');
+    return pht('Type "not tagged with any projects"...');
   }
 
   public function getDatasourceApplicationClass() {
@@ -18,10 +18,11 @@
   public function getDatasourceFunctions() {
     return array(
       'null' => array(
-        'name' => pht('Not In Any Projects'),
-        'summary' => pht('Find results which are not in any projects.'),
+        'name' => pht('Not Tagged With Any Projects'),
+        'summary' => pht(
+          'Find results which are not tagged with any projects.'),
         'description' => pht(
-          "This function matches results which are not associated with any ".
+          "This function matches results which are not tagged with any ".
           "projects. It is usually most often used to find objects which ".
           "might have slipped through the cracks and not been organized ".
           "properly.\n\n%s",
@@ -60,7 +61,7 @@
   }
 
   private function buildNullResult() {
-    $name = pht('Not In Any Projects');
+    $name = pht('Not Tagged With Any Projects');
 
     return $this->newFunctionResult()
       ->setUnique(true)
diff --git a/src/applications/search/query/PhabricatorSearchApplicationSearchEngine.php b/src/applications/search/query/PhabricatorSearchApplicationSearchEngine.php
--- a/src/applications/search/query/PhabricatorSearchApplicationSearchEngine.php
+++ b/src/applications/search/query/PhabricatorSearchApplicationSearchEngine.php
@@ -163,7 +163,7 @@
       ->appendControl(
         id(new AphrontFormTokenizerControl())
           ->setName('projectPHIDs')
-          ->setLabel(pht('In Any Project'))
+          ->setLabel(pht('Tags'))
           ->setDatasource(new PhabricatorProjectDatasource())
           ->setValue($project_phids));
   }