Approval.

hi/units_length_set.php

@@ -1,10 +1,10 @@
 <?PHP
 declare(strict_types = 1);
 $units_length_set = array (
-  'm' => 'm',
-  'dm' => 'dm',
-  'cm' => 'cm',
-  'mm' => 'mm',
-  'ft' => 'ft',
-  'in' => 'inch',
+  'm' => 'एम',
+  'dm' => 'डीएम',
+  'cm' => 'सेमी',
+  'mm' => 'मिमी',
+  'ft' => 'फुट',
+  'in' => 'इंच',
 );