diff --git a/.arclint b/.arclint
--- a/.arclint
+++ b/.arclint
@@ -46,6 +46,10 @@
             "exclude": [
                 "(^test/lint/lint-python-format\\.py$)"
             ]
+        },
+        "lint-locale-dependence": {
+            "type": "lint-locale-dependence",
+            "include": "(^src/.*\\.(h|cpp)$)"
         }
     }
 }
diff --git a/arcanist/.phutil_module_cache b/arcanist/.phutil_module_cache
--- a/arcanist/.phutil_module_cache
+++ b/arcanist/.phutil_module_cache
@@ -1 +1 @@
-{"__symbol_cache_version__":11,"d60c8224f471e0ecddc2a6f3c6839cd1":{"have":{"class":{"AutoPEP8FormatLinter":75}},"need":{"function":{"pht":297,"id":1317},"class":{"ArcanistExternalLinter":104,"ArcanistLintMessage":1324,"Filesystem":1168,"ArcanistLinter":1431,"ArcanistLintSeverity":1509}},"xmap":{"AutoPEP8FormatLinter":["ArcanistExternalLinter"]}},"213c3145da34ed6dfc0d70d628a2a086":{"have":{"class":{"CheckDocLinter":106}},"need":{"function":{"pht":323,"id":1868},"class":{"ArcanistExternalLinter":129,"ArcanistLintMessage":1875,"Filesystem":737,"ArcanistLinter":1923,"ArcanistLintSeverity":2009}},"xmap":{"CheckDocLinter":["ArcanistExternalLinter"]}},"7bab1f879b8a86dd9977b8c0d075935f":{"have":{"class":{"ClangFormatLinter":79}},"need":{"function":{"pht":302,"execx":787,"id":1664},"class":{"ArcanistExternalLinter":105,"ArcanistLintMessage":1671,"Filesystem":1515,"ArcanistLinter":1778,"ArcanistLintSeverity":1856}},"xmap":{"ClangFormatLinter":["ArcanistExternalLinter"]}},"0e068a1116ed03e86a2388020a821983":{"have":{"class":{"PythonFormatLinter":75}},"need":{"function":{"pht":305,"id":1614},"class":{"ArcanistExternalLinter":102,"ArcanistLintMessage":1621,"Filesystem":733,"ArcanistLinter":1752,"ArcanistLintSeverity":1835}},"xmap":{"PythonFormatLinter":["ArcanistExternalLinter"]}},"ea2beb1668dfbdd87488f18fbb20178f":{"have":{"class":{"TestsLinter":103}},"need":{"function":{"pht":318,"id":2676},"class":{"ArcanistExternalLinter":123,"ArcanistLintMessage":2683,"Filesystem":791,"ArcanistLinter":2731,"ArcanistLintSeverity":2839}},"xmap":{"TestsLinter":["ArcanistExternalLinter"]}}}
\ No newline at end of file
+{"__symbol_cache_version__":11,"d60c8224f471e0ecddc2a6f3c6839cd1":{"have":{"class":{"AutoPEP8FormatLinter":75}},"need":{"function":{"pht":297,"id":1317},"class":{"ArcanistExternalLinter":104,"ArcanistLintMessage":1324,"Filesystem":1168,"ArcanistLinter":1431,"ArcanistLintSeverity":1509}},"xmap":{"AutoPEP8FormatLinter":["ArcanistExternalLinter"]}},"213c3145da34ed6dfc0d70d628a2a086":{"have":{"class":{"CheckDocLinter":106}},"need":{"function":{"pht":323,"id":1868},"class":{"ArcanistExternalLinter":129,"ArcanistLintMessage":1875,"Filesystem":737,"ArcanistLinter":1923,"ArcanistLintSeverity":2009}},"xmap":{"CheckDocLinter":["ArcanistExternalLinter"]}},"7bab1f879b8a86dd9977b8c0d075935f":{"have":{"class":{"ClangFormatLinter":79}},"need":{"function":{"pht":302,"execx":787,"id":1664},"class":{"ArcanistExternalLinter":105,"ArcanistLintMessage":1671,"Filesystem":1515,"ArcanistLinter":1778,"ArcanistLintSeverity":1856}},"xmap":{"ClangFormatLinter":["ArcanistExternalLinter"]}},"ea2beb1668dfbdd87488f18fbb20178f":{"have":{"class":{"TestsLinter":103}},"need":{"function":{"pht":318,"id":2676},"class":{"ArcanistExternalLinter":123,"ArcanistLintMessage":2683,"Filesystem":791,"ArcanistLinter":2731,"ArcanistLintSeverity":2839}},"xmap":{"TestsLinter":["ArcanistExternalLinter"]}},"d8eaa2e7c86750dc3ee35036b5fd8bfc":{"have":{"class":{"LocaleDependenceLinter":137}},"need":{"function":{"pht":375,"id":2052},"class":{"ArcanistExternalLinter":168,"ArcanistLintMessage":2059,"Filesystem":816,"ArcanistLinter":2107,"ArcanistLintSeverity":2227}},"xmap":{"LocaleDependenceLinter":["ArcanistExternalLinter"]}},"e3132d407656d565ce80d359f4f0fe5f":{"have":{"class":{"PythonFormatLinter":124}},"need":{"function":{"pht":354,"id":1845},"class":{"ArcanistExternalLinter":151,"ArcanistLintMessage":1852,"Filesystem":777,"ArcanistLinter":1977,"ArcanistLintSeverity":2060}},"xmap":{"PythonFormatLinter":["ArcanistExternalLinter"]}}}
\ No newline at end of file
diff --git a/arcanist/__phutil_library_map__.php b/arcanist/__phutil_library_map__.php
--- a/arcanist/__phutil_library_map__.php
+++ b/arcanist/__phutil_library_map__.php
@@ -12,6 +12,7 @@
     'AutoPEP8FormatLinter' => 'linter/AutoPEP8Linter.php',
     'CheckDocLinter' => 'linter/CheckDocLinter.php',
     'ClangFormatLinter' => 'linter/ClangFormatLinter.php',
+    'LocaleDependenceLinter' => 'linter/LocalDependenceLinter.php',
     'PythonFormatLinter' => 'linter/PythonFormatLinter.php',
     'TestsLinter' => 'linter/TestsLinter.php',
   ),
@@ -20,6 +21,7 @@
     'AutoPEP8FormatLinter' => 'ArcanistExternalLinter',
     'CheckDocLinter' => 'ArcanistExternalLinter',
     'ClangFormatLinter' => 'ArcanistExternalLinter',
+    'LocaleDependenceLinter' => 'ArcanistExternalLinter',
     'PythonFormatLinter' => 'ArcanistExternalLinter',
     'TestsLinter' => 'ArcanistExternalLinter',
   ),
diff --git a/arcanist/linter/LocalDependenceLinter.php b/arcanist/linter/LocalDependenceLinter.php
new file mode 100644
--- /dev/null
+++ b/arcanist/linter/LocalDependenceLinter.php
@@ -0,0 +1,131 @@
+<?php
+
+/**
+ * Uses the lint-locale-dependence.sh script to output an error when functions
+ * relying on the system locale are used.
+ */
+final class LocaleDependenceLinter extends ArcanistExternalLinter {
+  
+  const ADVICE_MESSAGE = 
+    'Unnecessary locale dependence can cause bugs and should be avoided. '.
+    'Otherwise an exception can be added to the lint-locale-dependence script.';
+
+  public function getInfoName() {
+    return 'lint-locale-dependence';
+  }
+
+  public function getInfoURI() {
+    return '';
+  }
+
+  public function getInfoDescription() {
+    return pht('Throw an error when functions relying on the system locale '.
+               'are used.');
+  }
+
+  public function getLinterName() {
+    return 'lint-locale-dependence';
+  }
+
+  public function getLinterConfigurationName() {
+    return 'lint-locale-dependence';
+  }
+
+  public function getLinterConfigurationOptions() {
+    $options = array(
+    );
+
+    return $options + parent::getLinterConfigurationOptions();
+  }
+
+  public function getDefaultBinary() {
+    return Filesystem::resolvePath(
+      'test/lint/lint-locale-dependence.sh',
+      $this->getProjectRoot());
+  }
+  
+  public function shouldUseInterpreter() {
+    return true;
+  }
+  
+  public function getDefaultInterpreter() {
+    return "bash";
+  }
+  
+  public function getInstallInstructions() {
+    return pht('The test/lint/lint-locale-dependence.sh script is part of the
+               bitcoin-abc project. Requires git >= 2.6.5.');
+  }
+
+  public function shouldExpectCommandErrors() {
+    return false;
+  }
+
+  protected function getMandatoryFlags() {
+    return array(
+    );
+  }
+
+  protected function parseLinterOutput($path, $err, $stdout, $stderr) {
+    /*
+     * Stdout contains 2 sections:
+     * 1/ The locale dependent function in a sentence:
+     *   The locale dependent function <function>(...) appears to be used
+     * Followed by the file and the corresponding code lines
+     *   <file path>: <code line using the function>
+     * 2/ Section with a general warning, will not be used by Arcanist. Instead
+     * we define our own advice message.
+     * 
+     * First a list of the locale dependent functions will be determined, then
+     * the code lines containing these functions.
+     * An error message is generated for each line of code. 
+     */
+
+    /* 
+     * Extract infos from the path
+     */
+    $pathinfo = pathinfo($path);
+    $fileName = $pathinfo['basename'];
+
+    $messages = [];
+
+    /* Find the functions */
+    $pattern = '/The locale dependent function (\w+)\(...\)/';
+    if (!preg_match_all($pattern, $stdout, $matches, $flags = PREG_SET_ORDER)) {
+      return $messages;
+    }
+
+    $functions = [];
+    foreach($matches as $match) {
+      $functions[] = $match[1];
+    }
+
+    /* Find the code lines */
+    $pattern = '/'.$fileName.':(\d+): (.+)/';
+    if (preg_match_all($pattern, $stdout, $matches, $flags = PREG_SET_ORDER)) {
+      foreach ($matches as $match) {
+        list(, $lineNumber, $codeSnippet) = $match;
+        
+        /* Determine which function is used */
+        $functionUsed = '';
+        foreach($functions as $function) {
+          if (strpos($codeSnippet, $function) !== FALSE) {
+            $functionUsed = $function;
+            break;
+          }
+        }
+
+        $messages[] = id(new ArcanistLintMessage())
+          ->setGranularity(ArcanistLinter::GRANULARITY_FILE)
+          ->setCode('LOCALE_DEPENDENCE')
+          ->setPath($path)
+          ->setLine($lineNumber)
+          ->setSeverity(ArcanistLintSeverity::SEVERITY_ERROR)
+          ->setName('Locale dependent function '.$functionUsed)
+          ->setDescription(self::ADVICE_MESSAGE);
+      }
+    }
+
+    return $messages;
+  }
+}
diff --git a/test/lint/lint-locale-dependence.sh b/test/lint/lint-locale-dependence.sh
--- a/test/lint/lint-locale-dependence.sh
+++ b/test/lint/lint-locale-dependence.sh
@@ -197,9 +197,9 @@
 
 # Invoke "git grep" only once in order to minimize run-time
 REGEXP_LOCALE_DEPENDENT_FUNCTIONS=$(join_array "|" "${LOCALE_DEPENDENT_FUNCTIONS[@]}")
-GIT_GREP_OUTPUT=$(git grep -nE "[^a-zA-Z0-9_\`'\"<>](${REGEXP_LOCALE_DEPENDENT_FUNCTIONS}(_r|_s)?)[^a-zA-Z0-9_\`'\"<>]" -- ":/*.cpp" ":/*.h")
+GIT_GREP_OUTPUT=$(git grep -nE "[^a-zA-Z0-9_\`'\"<>](${REGEXP_LOCALE_DEPENDENT_FUNCTIONS}(_r|_s)?)[^a-zA-Z0-9_\`'\"<>]" -- "$1")
 
-EXIT_CODE=0
+FUNCTION_FOUND=0
 for LOCALE_DEPENDENT_FUNCTION in "${LOCALE_DEPENDENT_FUNCTIONS[@]}"; do
     MATCHES=$(grep -E "[^a-zA-Z0-9_\`'\"<>]${LOCALE_DEPENDENT_FUNCTION}(_r|_s)?[^a-zA-Z0-9_\`'\"<>]" <<< "${GIT_GREP_OUTPUT}" | \
         grep -vE "\.(c|cpp|h):[0-9]+:\s*(//|\*|/\*|\").*${LOCALE_DEPENDENT_FUNCTION}")
@@ -213,10 +213,10 @@
         echo "The locale dependent function ${LOCALE_DEPENDENT_FUNCTION}(...) appears to be used:"
         echo "${MATCHES}"
         echo
-        EXIT_CODE=1
+        FUNCTION_FOUND=1
     fi
 done
-if [[ ${EXIT_CODE} != 0 ]]; then
+if [[ ${FUNCTION_FOUND} != 0 ]]; then
     echo "Unnecessary locale dependence can cause bugs that are very"
     echo "tricky to isolate and fix. Please avoid using locale dependent"
     echo "functions if possible."
@@ -224,4 +224,4 @@
     echo "Advice not applicable in this specific case? Add an exception"
     echo "by updating the ignore list in $0"
 fi
-exit ${EXIT_CODE}
+exit 0