Index: ps/trunk/.arclint
===================================================================
--- ps/trunk/.arclint
+++ ps/trunk/.arclint
@@ -16,6 +16,9 @@
         "5": "disabled"
       }
     },
+    "project-name": {
+      "type": "project-name"
+    },
     "licence-year": {
       "type": "licence-year"
     },
Index: ps/trunk/build/arclint/README.md
===================================================================
--- ps/trunk/build/arclint/README.md
+++ ps/trunk/build/arclint/README.md
@@ -1,12 +1,13 @@
 # Linting
 
-This folder tools for linting 0 A.D. code
+This folder contains tools for linting 0 A.D. code
 Linting is done via Arcanist: https://secure.phabricator.com/book/phabricator/article/arcanist_lint/
 
 ## Linters
 
 - `text` is configured to detect whitespace issues.
 - `json` detects JSON syntax errors.
+- `project-name` detects misspellings of the project name "0 A.D.". In particular the non-breaking space.
 - `licence-year` detects Copyright header years and compares against modification time.
 - `eslint`, if installed, will run on javascript files.
 - `cppcheck`, if installed, will run on C++ files.
Index: ps/trunk/build/arclint/pyrolint/__phutil_library_map__.php
===================================================================
--- ps/trunk/build/arclint/pyrolint/__phutil_library_map__.php
+++ ps/trunk/build/arclint/pyrolint/__phutil_library_map__.php
@@ -12,11 +12,15 @@
     'ESLintLinter' => 'src/ESLintLinter.php',
     'JenkinsRenderer' => 'src/JenkinsRenderer.php',
     'LicenceYearLinter' => 'src/LicenceYearLinter.php',
+    'ProjectNameLinter' => 'src/ProjectNameLinter.php',
+  ),
+  'function' => array(
+    'remove_null' => 'src/JenkinsRenderer.php',
   ),
-  'function' => array(),
   'xmap' => array(
     'ESLintLinter' => 'ArcanistExternalLinter',
     'JenkinsRenderer' => 'ArcanistLintRenderer',
     'LicenceYearLinter' => 'ArcanistLinter',
+    'ProjectNameLinter' => 'ArcanistLinter',
   ),
 ));
Index: ps/trunk/build/arclint/pyrolint/src/ProjectNameLinter.php
===================================================================
--- ps/trunk/build/arclint/pyrolint/src/ProjectNameLinter.php
+++ ps/trunk/build/arclint/pyrolint/src/ProjectNameLinter.php
@@ -0,0 +1,72 @@
+<?php
+/**
+ * Copyright 2023 Wildfire Games.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Linter for the project name 0 A.D..
+ */
+final class ProjectNameLinter extends ArcanistLinter {
+
+  public function getInfoName() {
+    return pht('Project Name Linter');
+  }
+
+  public function getLinterName() {
+    return 'Project Name';
+  }
+
+  public function getLinterConfigurationName() {
+    return 'project-name';
+  }
+
+  const BAD_NAME = 1;
+
+  public function getLintSeverityMap() {
+    return array(
+      self::BAD_NAME => ArcanistLintSeverity::SEVERITY_WARNING,
+    );
+  }
+
+  public function getLintNameMap() {
+    return array(
+      self::BAD_NAME => pht('Incorrect project name. Notice the non-breaking space in 0 A.D.'),
+    );
+  }
+
+  public function lintPath($path) {
+    $txt = $this->getData($path);
+
+    $matches = null;
+    $preg = preg_match_all(
+      "/((?!0 A\\.D\\.|0ad)0\\s?(?:A|a)\\.?(?:D|d)\\.?)/",
+      $txt,
+      $matches,
+      PREG_OFFSET_CAPTURE);
+
+    if (!$preg) {
+      return;
+    }
+
+    foreach ($matches[0] as $match) {
+      list($string, $offset) = $match;
+      $this->raiseLintAtOffset(
+        $offset,
+        self::BAD_NAME,
+        pht('Incorrect project name. Notice the non-breaking space in 0 A.D.'),
+        $string);
+    }
+  }
+}