diff --git a/admin/code/CMSMenu.php b/admin/code/CMSMenu.php
index 223031c10..d95c6d289 100644
--- a/admin/code/CMSMenu.php
+++ b/admin/code/CMSMenu.php
@@ -318,7 +318,7 @@ class CMSMenu extends Object implements IteratorAggregate, i18nEntityProvider
 		foreach($cmsClasses as $cmsClass) {
 			$defaultTitle = LeftAndMain::menu_title_for_class($cmsClass);
 			$ownerModule = i18n::get_owner_module($cmsClass);
-			$entities["{$cmsClass}.MENUTITLE"] = array($defaultTitle, PR_HIGH, 'Menu title', $ownerModule);
+			$entities["{$cmsClass}.MENUTITLE"] = array($defaultTitle, 'Menu title', $ownerModule);
 		}
 		return $entities;
 	}
diff --git a/admin/code/LeftAndMain.php b/admin/code/LeftAndMain.php
index e4051c616..75b557d48 100644
--- a/admin/code/LeftAndMain.php
+++ b/admin/code/LeftAndMain.php
@@ -160,7 +160,7 @@ class LeftAndMain extends Controller implements PermissionProvider {
 		// can't be done in cms/_config.php as locale is not set yet
 		CMSMenu::add_link(
 			'Help', 
-			_t('LeftAndMain.HELP', 'Help', PR_HIGH, 'Menu title'), 
+			_t('LeftAndMain.HELP', 'Help', 'Menu title'), 
 			self::$help_link
 		);
 
@@ -1298,7 +1298,7 @@ class LeftAndMain extends Controller implements PermissionProvider {
 				'name' => sprintf(_t(
 					'CMSMain.ACCESS', 
 					"Access to '%s' section",
-					PR_MEDIUM,
+					
 					"Item in permission selection identifying the admin section. Example: Access to 'Files & Images'"
 				), $title, null),
 				'category' => _t('Permission.CMS_ACCESS_CATEGORY', 'CMS Access')
diff --git a/admin/templates/Includes/CMSLoadingScreen.ss b/admin/templates/Includes/CMSLoadingScreen.ss
index ed896c8d7..24551c224 100644
--- a/admin/templates/Includes/CMSLoadingScreen.ss
+++ b/admin/templates/Includes/CMSLoadingScreen.ss
@@ -1,6 +1,6 @@
 <div class="ss-loading-screen">
 	<div class="loading-logo">
-		<img class="loading-animation" src="$ModulePath(frameworkadmin)/images/spinner.gif" alt="<% _t('LOADING','Loading...',PR_HIGH) %>" />
-		<noscript><p class="nojs-warning"><span class="message notice"><% _t('REQUIREJS','The CMS requires that you have JavaScript enabled.',PR_HIGH) %></span></p></noscript>
+		<img class="loading-animation" src="$ModulePath(frameworkadmin)/images/spinner.gif" alt="<% _t('LOADING','Loading...') %>" />
+		<noscript><p class="nojs-warning"><span class="message notice"><% _t('REQUIREJS','The CMS requires that you have JavaScript enabled.') %></span></p></noscript>
 	</div>
 </div>
diff --git a/core/Core.php b/core/Core.php
index 2d51ae740..73c2238d3 100644
--- a/core/Core.php
+++ b/core/Core.php
@@ -391,8 +391,8 @@ function stripslashes_recursively(&$array) {
 /**
  * @see i18n::_t()
  */
-function _t($entity, $string = "", $priority = 40, $context = "") {
-	return i18n::_t($entity, $string, $priority, $context);
+function _t($entity, $string = "", $context = "") {
+	return i18n::_t($entity, $string, $context);
 }
 
 /**
diff --git a/filesystem/File.php b/filesystem/File.php
index 2158fad53..65ba2cfc2 100644
--- a/filesystem/File.php
+++ b/filesystem/File.php
@@ -856,7 +856,7 @@ class File extends DataObject {
 					_t(
 						'File.INVALIDEXTENSION', 
 						'Extension is not allowed (valid: %s)',
-						PR_MEDIUM,
+						
 						'Argument 1: Comma-separated list of valid extensions'
 					),
 					wordwrap(implode(', ',$exts))
diff --git a/filesystem/Upload.php b/filesystem/Upload.php
index 509e5eb8c..31339dcec 100644
--- a/filesystem/Upload.php
+++ b/filesystem/Upload.php
@@ -500,7 +500,7 @@ class Upload_Validator {
 				_t(
 					'File.TOOLARGE', 
 					'Filesize is too large, maximum %s allowed.',
-					PR_MEDIUM,
+					
 					'Argument 1: Filesize (e.g. 1MB)'
 				),
 				$arg
@@ -514,7 +514,7 @@ class Upload_Validator {
 				_t(
 					'File.INVALIDEXTENSION', 
 					'Extension is not allowed (valid: %s)',
-					PR_MEDIUM,
+					
 					'Argument 1: Comma-separated list of valid extensions'
 				),
 				wordwrap(implode(', ', $this->allowedExtensions))
diff --git a/forms/ConfirmedPasswordField.php b/forms/ConfirmedPasswordField.php
index 02a631640..889b3342a 100644
--- a/forms/ConfirmedPasswordField.php
+++ b/forms/ConfirmedPasswordField.php
@@ -107,7 +107,7 @@ class ConfirmedPasswordField extends FormField {
 				$title = _t(
 					'ConfirmedPasswordField.SHOWONCLICKTITLE', 
 					'Change Password', 
-					PR_MEDIUM, 
+					
 					'Label of the link which triggers display of the "change password" formfields'
 				);
 			}
diff --git a/forms/NullableField.php b/forms/NullableField.php
index c1e17a53c..700950e0e 100644
--- a/forms/NullableField.php
+++ b/forms/NullableField.php
@@ -42,7 +42,7 @@ class NullableField extends FormField {
 		$this->isNullLabel = $isNullLabel;
 		if ( is_null($this->isNullLabel) ) {
 			// Set a default label if one is not provided.
-			$this->isNullLabel = _t('NullableField.IsNullLabel', 'Is Null', PR_HIGH);
+			$this->isNullLabel = _t('NullableField.IsNullLabel', 'Is Null');
 		}
 		parent::__construct($valueField->getName(), $valueField->Title(), $valueField->Value(), $valueField->getForm(), $valueField->RightTitle());
 		$this->readonly = $valueField->isReadonly();
diff --git a/forms/TreeDropdownField.php b/forms/TreeDropdownField.php
index aa714fc98..3b6f101df 100644
--- a/forms/TreeDropdownField.php
+++ b/forms/TreeDropdownField.php
@@ -175,7 +175,7 @@ class TreeDropdownField extends FormField {
 		if($record) {
 			$title = $record->{$this->labelField};
 		} else {
-			$title = _t('DropdownField.CHOOSE', '(Choose)', PR_MEDIUM, 'start value of a dropdown');
+			$title = _t('DropdownField.CHOOSE', '(Choose)', 'start value of a dropdown');
 		}
 
 		// TODO Implement for TreeMultiSelectField
diff --git a/forms/TreeMultiselectField.php b/forms/TreeMultiselectField.php
index 3529774fa..2647e0ba1 100644
--- a/forms/TreeMultiselectField.php
+++ b/forms/TreeMultiselectField.php
@@ -104,7 +104,7 @@ class TreeMultiselectField extends TreeDropdownField {
 				$value = implode(",", $idArray);
 			}
 		} else {
-			$title = _t('DropdownField.CHOOSE', '(Choose)', PR_MEDIUM, 'start value of a dropdown');
+			$title = _t('DropdownField.CHOOSE', '(Choose)', 'start value of a dropdown');
 		} 
 		
 		return $this->createTag (
diff --git a/forms/gridfield/GridFieldAddExistingAutocompleter.php b/forms/gridfield/GridFieldAddExistingAutocompleter.php
index e019667a8..a9f1f4629 100755
--- a/forms/gridfield/GridFieldAddExistingAutocompleter.php
+++ b/forms/gridfield/GridFieldAddExistingAutocompleter.php
@@ -252,13 +252,13 @@ class GridFieldAddExistingAutocompleter implements GridField_HTMLProvider, GridF
 			}
 			if($labels) {
 				return sprintf(
-					_t('GridField.PlaceHolderWithLabels', 'Find %s by %s', PR_MEDIUM, 'Find <object type> by <field names>'), 
+					_t('GridField.PlaceHolderWithLabels', 'Find %s by %s', 'Find <object type> by <field names>'), 
 					singleton($dataClass)->plural_name(),
 					implode(', ', $labels)
 				);
 			} else {
 				return sprintf(
-					_t('GridField.PlaceHolder', 'Find %s', PR_MEDIUM, 'Find <object type>'), 
+					_t('GridField.PlaceHolder', 'Find %s', 'Find <object type>'), 
 					singleton($dataClass)->plural_name()
 				);
 			}
diff --git a/i18n/i18n.php b/i18n/i18n.php
index 31c017d2c..ba26922ba 100644
--- a/i18n/i18n.php
+++ b/i18n/i18n.php
@@ -12,7 +12,7 @@ require_once 'i18nRailsYamlAdapter.php';
  * PHP:
  * <code>
  * _t('MyNamespace.MYENTITY', 'My default natural language value');
- * _t('MyNamespace.MYENTITY', 'My default natural language value', PR_MEDIUM, 'My explanatory context');
+ * _t('MyNamespace.MYENTITY', 'My default natural language value', 'My explanatory context');
  * sprintf(_t('MyNamespace.MYENTITY', 'Counting %s things'), 42);
  * </code>
  * 
diff --git a/i18n/i18nEntityProvider.php b/i18n/i18nEntityProvider.php
index 86ae9e9d0..a9e620580 100644
--- a/i18n/i18nEntityProvider.php
+++ b/i18n/i18nEntityProvider.php
@@ -25,7 +25,7 @@ interface i18nEntityProvider {
 	 * 	foreach($this->stat('my_static_array) as $key => $value) {
 	 * 		$entities["MyTestClass.my_static_array_{$key}"] = array(
 	 * 			$value,
-	 * 			PR_MEDIUM,
+	 * 			
 	 * 			'My context description'
 	 * 		);
 	 * 	}
@@ -52,7 +52,7 @@ interface i18nEntityProvider {
 	 * 	$entities = array();
 	 * 		$entities["MyOtherModuleClass.MYENTITY"] = array(
 	 * 			$value,
-	 * 			PR_MEDIUM,
+	 * 			
 	 * 			'My context description',
 	 * 			'myothermodule'
 	 * 		);
diff --git a/model/DataObject.php b/model/DataObject.php
index f6d12dd13..852ca21fd 100644
--- a/model/DataObject.php
+++ b/model/DataObject.php
@@ -3304,13 +3304,13 @@ class DataObject extends ViewableData implements DataObjectInterface, i18nEntity
 		
 		$entities["{$this->class}.SINGULARNAME"] = array(
 			$this->singular_name(),
-			PR_MEDIUM,
+			
 			'Singular name of the object, used in dropdowns and to generally identify a single object in the interface'
 		);
 
 		$entities["{$this->class}.PLURALNAME"] = array(
 			$this->plural_name(),
-			PR_MEDIUM,
+			
 			'Pural name of the object, used in dropdowns and to generally identify a collection of this object in the interface'
 		);
 		
diff --git a/model/Versioned.php b/model/Versioned.php
index 83360d369..5612cb201 100644
--- a/model/Versioned.php
+++ b/model/Versioned.php
@@ -1049,7 +1049,7 @@ class Versioned extends DataExtension {
 	protected static $reading_mode = null;
 	
 	function updateFieldLabels(&$labels) {
-		$labels['Versions'] = _t('Versioned.has_many_Versions', 'Versions', PR_MEDIUM, 'Past Versions of this page');
+		$labels['Versions'] = _t('Versioned.has_many_Versions', 'Versions', 'Past Versions of this page');
 	}
 	
 	function flushCache() {
diff --git a/model/fieldtypes/Date.php b/model/fieldtypes/Date.php
index f7630236f..7de0cca95 100644
--- a/model/fieldtypes/Date.php
+++ b/model/fieldtypes/Date.php
@@ -195,7 +195,7 @@ class Date extends DBField {
 					_t(
 						'Date.TIMEDIFFAGO',
 						"%s ago",
-						PR_MEDIUM,
+						
 						'Natural language time difference, e.g. 2 hours ago'
 					),
 					$this->TimeDiff()
@@ -205,7 +205,7 @@ class Date extends DBField {
 					_t(
 						'Date.TIMEDIFFIN',
 						"in %s",
-						PR_MEDIUM,
+						
 						'Natural language time difference, e.g. in 2 hours'
 					),
 					$this->TimeDiff()
diff --git a/security/Group.php b/security/Group.php
index 0beb16083..65e1c45a5 100755
--- a/security/Group.php
+++ b/security/Group.php
@@ -189,13 +189,13 @@ class Group extends DataObject {
 		$labels = parent::fieldLabels($includerelations);
 		$labels['Title'] = _t('SecurityAdmin.GROUPNAME', 'Group name');
 		$labels['Description'] = _t('Group.Description', 'Description');
-		$labels['Code'] = _t('Group.Code', 'Group Code', PR_MEDIUM, 'Programmatical code identifying a group');
-		$labels['Locked'] = _t('Group.Locked', 'Locked?', PR_MEDIUM, 'Group is locked in the security administration area');
+		$labels['Code'] = _t('Group.Code', 'Group Code', 'Programmatical code identifying a group');
+		$labels['Locked'] = _t('Group.Locked', 'Locked?', 'Group is locked in the security administration area');
 		$labels['Sort'] = _t('Group.Sort', 'Sort Order');
 		if($includerelations){
-			$labels['Parent'] = _t('Group.Parent', 'Parent Group', PR_MEDIUM, 'One group has one parent group');
-			$labels['Permissions'] = _t('Group.has_many_Permissions', 'Permissions', PR_MEDIUM, 'One group has many permissions');
-			$labels['Members'] = _t('Group.many_many_Members', 'Members', PR_MEDIUM, 'One group has many members');
+			$labels['Parent'] = _t('Group.Parent', 'Parent Group', 'One group has one parent group');
+			$labels['Permissions'] = _t('Group.has_many_Permissions', 'Permissions', 'One group has many permissions');
+			$labels['Members'] = _t('Group.many_many_Members', 'Members', 'One group has many members');
 		}
 		
 		return $labels;
diff --git a/security/Member.php b/security/Member.php
index c589cf840..3b7f96bc6 100644
--- a/security/Member.php
+++ b/security/Member.php
@@ -630,7 +630,7 @@ class Member extends DataObject implements TemplateGlobalProvider {
 					_t(
 						'Member.ValidationIdentifierFailed', 
 						'Can\'t overwrite existing member #%d with identical identifier (%s = %s))', 
-						PR_MEDIUM,
+						
 						'The values in brackets show a fieldname mapped to a value, usually denoting an existing email address'
 					),
 					$existingRecord->ID,
@@ -1104,7 +1104,7 @@ class Member extends DataObject implements TemplateGlobalProvider {
 				
 		$mainFields->replaceField('Locale', new DropdownField(
 			"Locale", 
-			_t('Member.INTERFACELANG', "Interface Language", PR_MEDIUM, 'Language of the CMS'), 
+			_t('Member.INTERFACELANG', "Interface Language", 'Language of the CMS'), 
 			i18n::get_existing_translations()
 		));
 		
@@ -1208,11 +1208,11 @@ class Member extends DataObject implements TemplateGlobalProvider {
 		$labels['Password'] = _t('Member.db_Password', 'Password');
 		$labels['NumVisit'] = _t('Member.db_NumVisit', 'Number of Visits');
 		$labels['LastVisited'] = _t('Member.db_LastVisited', 'Last Visited Date');
-		$labels['PasswordExpiry'] = _t('Member.db_PasswordExpiry', 'Password Expiry Date', PR_MEDIUM, 'Password expiry date');
-		$labels['LockedOutUntil'] = _t('Member.db_LockedOutUntil', 'Locked out until', PR_MEDIUM, 'Security related date');
+		$labels['PasswordExpiry'] = _t('Member.db_PasswordExpiry', 'Password Expiry Date', 'Password expiry date');
+		$labels['LockedOutUntil'] = _t('Member.db_LockedOutUntil', 'Locked out until', 'Security related date');
 		$labels['Locale'] = _t('Member.db_Locale', 'Interface Locale');
 		if($includerelations){
-			$labels['Groups'] = _t('Member.belongs_many_many_Groups', 'Groups', PR_MEDIUM, 'Security Groups this member belongs to');
+			$labels['Groups'] = _t('Member.belongs_many_many_Groups', 'Groups', 'Security Groups this member belongs to');
 		}
 		return $labels;
 	}
@@ -1542,7 +1542,7 @@ class Member_ChangePasswordEmail extends Email {
     
     function __construct() {
 		parent::__construct();
-    	$this->subject = _t('Member.SUBJECTPASSWORDCHANGED', "Your password has been changed", PR_MEDIUM, 'Email subject');
+    	$this->subject = _t('Member.SUBJECTPASSWORDCHANGED', "Your password has been changed", 'Email subject');
     }
 }
 
@@ -1560,7 +1560,7 @@ class Member_ForgotPasswordEmail extends Email {
     
     function __construct() {
 		parent::__construct();
-    	$this->subject = _t('Member.SUBJECTPASSWORDRESET', "Your password reset link", PR_MEDIUM, 'Email subject');
+    	$this->subject = _t('Member.SUBJECTPASSWORDRESET', "Your password reset link", 'Email subject');
     }
 }
 
diff --git a/security/PermissionCheckboxSetField.php b/security/PermissionCheckboxSetField.php
index 968ee929a..4f37bb854 100644
--- a/security/PermissionCheckboxSetField.php
+++ b/security/PermissionCheckboxSetField.php
@@ -114,7 +114,7 @@ class PermissionCheckboxSetField extends FormField {
 								_t(
 									'PermissionCheckboxSetField.FromRole',
 									'inherited from role "%s"',
-									PR_MEDIUM,
+									
 									'A permission inherited from a certain permission role'
 								),
 								$role->Title
@@ -136,7 +136,7 @@ class PermissionCheckboxSetField extends FormField {
 										_t(
 											'PermissionCheckboxSetField.FromRoleOnGroup',
 											'inherited from role "%s" on group "%s"',
-											PR_MEDIUM,
+											
 											'A permission inherited from a role on a certain group'
 										),
 										$role->Title, 
@@ -153,7 +153,7 @@ class PermissionCheckboxSetField extends FormField {
 									_t(
 										'PermissionCheckboxSetField.FromGroup',
 										'inherited from group "%s"',
-										PR_MEDIUM,
+										
 										'A permission inherited from a certain group'
 									),
 									$parent->Title
diff --git a/security/Security.php b/security/Security.php
index cd4607360..3e1d05784 100644
--- a/security/Security.php
+++ b/security/Security.php
@@ -182,7 +182,7 @@ class Security extends Controller {
 							'Security.ALREADYLOGGEDIN', 
 							"You don't have access to this page.  If you have another account that "
 								. "can access that page, you can log in again below.",
-							PR_MEDIUM,
+							
 							"%s will be replaced with a link to log in."
 						),
 						'logInAgain' => _t(
diff --git a/templates/ComplexTableField.ss b/templates/ComplexTableField.ss
index 79262244c..7df4cbc64 100644
--- a/templates/ComplexTableField.ss
+++ b/templates/ComplexTableField.ss
@@ -50,7 +50,7 @@
 					<input type="hidden" id="{$id}_PopupHeight" value="$PopupHeight" disabled="disabled">
 					<input type="hidden" id="{$id}_PopupWidth" value="$PopupWidth" disabled="disabled">
 					<a class="popuplink addlink" href="$AddLink" alt="add"><img src="$ModulePath(framework)/images/add.gif" alt="<% _t('ADDITEM', 'add') %>" />
-						<% sprintf(_t('ADDITEM', 'Add %s', PR_MEDIUM, 'Add [name]'),$Title) %>
+						<% sprintf(_t('ADDITEM', 'Add %s', 'Add [name]'),$Title) %>
 					</a>
 				</td>
 				<% control Actions %><td width="18">&nbsp;</td><% end_control %>
diff --git a/templates/email/ChangePasswordEmail.ss b/templates/email/ChangePasswordEmail.ss
index 749791c3d..5a7a8d374 100644
--- a/templates/email/ChangePasswordEmail.ss
+++ b/templates/email/ChangePasswordEmail.ss
@@ -1,7 +1,7 @@
 <p><% _t('HELLO', 'Hi') %> $FirstName,</p>
 
 <p>
-	<% _t('CHANGEPASSWORDTEXT1', 'You changed your password for', PR_MEDIUM, 'for a url') %> $AbsoluteBaseURL.<br />
+	<% _t('CHANGEPASSWORDTEXT1', 'You changed your password for', 'for a url') %> $AbsoluteBaseURL.<br />
 	<% _t('CHANGEPASSWORDTEXT2', 'You can now use the following credentials to log in:') %>
 </p>
 
diff --git a/tests/filesystem/UploadTest.php b/tests/filesystem/UploadTest.php
index 636ffed6f..8816d00b5 100644
--- a/tests/filesystem/UploadTest.php
+++ b/tests/filesystem/UploadTest.php
@@ -337,7 +337,7 @@ class UploadTest_Validator extends Upload_Validator implements TestOnly {
 				_t(
 					'File.TOOLARGE', 
 					'Filesize is too large, maximum %s allowed.',
-					PR_MEDIUM,
+					
 					'Argument 1: Filesize (e.g. 1MB)'
 				),
 				$arg
@@ -351,7 +351,7 @@ class UploadTest_Validator extends Upload_Validator implements TestOnly {
 				_t(
 					'File.INVALIDEXTENSION', 
 					'Extension is not allowed (valid: %s)',
-					PR_MEDIUM,
+					
 					'Argument 1: Comma-separated list of valid extensions'
 				),
 				implode(',', $this->allowedExtensions)
diff --git a/tests/i18n/_fakewebroot/i18ntestmodule/code/i18nTestModule.php b/tests/i18n/_fakewebroot/i18ntestmodule/code/i18nTestModule.php
index 9275007fd..30ef4b6e0 100644
--- a/tests/i18n/_fakewebroot/i18ntestmodule/code/i18nTestModule.php
+++ b/tests/i18n/_fakewebroot/i18ntestmodule/code/i18nTestModule.php
@@ -9,7 +9,6 @@ class i18nTestModule extends DataObject implements TestOnly {
 		_t(
 			'i18nTestModule.ENTITY', 
 			'Entity with "Double Quotes"', 
-			PR_LOW, 
 			'Comment for entity'
 		);
 	}