Index: phabricator-0~git20170812/arcanist/src/repository/api/ArcanistSubversionAPI.php
===================================================================
--- phabricator-0~git20170812.orig/arcanist/src/repository/api/ArcanistSubversionAPI.php
+++ phabricator-0~git20170812/arcanist/src/repository/api/ArcanistSubversionAPI.php
@@ -40,6 +40,7 @@ final class ArcanistSubversionAPI extend
     $argv[0] = 'svn '.$argv[0];
 
     $future = newv('ExecFuture', $argv);
+    $future->setEnv(array('LANG' => 'en_US.UTF-8'));
     $future->setCWD($this->getPath());
     return $future;
   }