diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -525,6 +525,7 @@
     'phutil_loggable_string' => 'utils/utils.php',
     'phutil_parse_bytes' => 'utils/viewutils.php',
     'phutil_passthru' => 'future/exec/execx.php',
+    'phutil_person' => 'internationalization/pht.php',
     'phutil_register_library' => 'moduleutils/core.php',
     'phutil_register_library_map' => 'moduleutils/core.php',
     'phutil_safe_html' => 'markup/render.php',
diff --git a/src/internationalization/PhutilLocale.php b/src/internationalization/PhutilLocale.php
--- a/src/internationalization/PhutilLocale.php
+++ b/src/internationalization/PhutilLocale.php
@@ -47,7 +47,7 @@
    * @return string Variant for use.
    */
   public function selectGenderVariant($variant, array $translations) {
-    if ($variant == PhutilPerson::SEX_FEMALE) {
+    if ($variant == PhutilPerson::GENDER_FEMININE) {
       return end($translations);
     } else {
       return reset($translations);
diff --git a/src/internationalization/PhutilPerson.php b/src/internationalization/PhutilPerson.php
--- a/src/internationalization/PhutilPerson.php
+++ b/src/internationalization/PhutilPerson.php
@@ -1,10 +1,11 @@
 <?php
 
 interface PhutilPerson {
-  const SEX_MALE = 'm';
-  const SEX_FEMALE = 'f';
-  const SEX_UNKNOWN = '';
 
-  public function getSex();
+  const GENDER_MASCULINE = 'm';
+  const GENDER_FEMININE = 'f';
+  const GENDER_UNKNOWN = '';
+
+  public function getGender();
   public function __toString();
 }
diff --git a/src/internationalization/PhutilTranslator.php b/src/internationalization/PhutilTranslator.php
--- a/src/internationalization/PhutilTranslator.php
+++ b/src/internationalization/PhutilTranslator.php
@@ -164,18 +164,18 @@
     }
 
     if ($variant instanceof PhutilNumber) {
-      $is_sex = false;
+      $is_gender = false;
       $variant = $variant->getNumber();
     } else if ($variant instanceof PhutilPerson) {
-      $is_sex = true;
-      $variant = $variant->getSex();
+      $is_gender = true;
+      $variant = $variant->getGender();
     } else if (is_int($variant)) {
-      $is_sex = false;
+      $is_gender = false;
     } else {
       return null;
     }
 
-    if ($is_sex) {
+    if ($is_gender) {
       return $this->locale->selectGenderVariant($variant, $translations);
     } else {
 
diff --git a/src/internationalization/__tests__/PhutilPersonTest.php b/src/internationalization/__tests__/PhutilPersonTest.php
--- a/src/internationalization/__tests__/PhutilPersonTest.php
+++ b/src/internationalization/__tests__/PhutilPersonTest.php
@@ -2,19 +2,19 @@
 
 final class PhutilPersonTest extends Phobject implements PhutilPerson {
 
-  private $sex = PhutilPerson::SEX_UNKNOWN;
+  private $gender = PhutilPerson::GENDER_UNKNOWN;
 
-  public function getSex() {
-    return $this->sex;
+  public function getGender() {
+    return $this->gender;
   }
 
-  public function setSex($value) {
-    $this->sex = $value;
+  public function setGender($value) {
+    $this->gender = $value;
     return $this;
   }
 
   public function __toString() {
-    return pht('Test (%s)', $this->sex);
+    return pht('Test (%s)', $this->gender);
   }
 
 }
diff --git a/src/internationalization/__tests__/PhutilTranslatorTestCase.php b/src/internationalization/__tests__/PhutilTranslatorTestCase.php
--- a/src/internationalization/__tests__/PhutilTranslatorTestCase.php
+++ b/src/internationalization/__tests__/PhutilTranslatorTestCase.php
@@ -79,12 +79,12 @@
       'Test () napsal.',
       $translator->translate('%s wrote.', $person));
 
-    $person->setSex(PhutilPerson::SEX_MALE);
+    $person->setGender(PhutilPerson::GENDER_MASCULINE);
     $this->assertEqual(
       'Test (m) napsal.',
       $translator->translate('%s wrote.', $person));
 
-    $person->setSex(PhutilPerson::SEX_FEMALE);
+    $person->setGender(PhutilPerson::GENDER_FEMININE);
     $this->assertEqual(
       'Test (f) napsala.',
       $translator->translate('%s wrote.', $person));
diff --git a/src/internationalization/pht.php b/src/internationalization/pht.php
--- a/src/internationalization/pht.php
+++ b/src/internationalization/pht.php
@@ -31,3 +31,16 @@
 
   return new PhutilNumber(count($countable));
 }
+
+/**
+ * Provide a gendered argument to the translation engine.
+ *
+ * This function does nothing and only serves as a marker for the static
+ * extractor so it knows particular arguments may vary on gender.
+ *
+ * @param PhutilPerson Something implementing @{interface:PhutilPerson}.
+ * @return PhutilPerson The argument, unmodified.
+ */
+function phutil_person(PhutilPerson $person) {
+  return $person;
+}