changing unicode characters in a module
1) run query 
ALTER DATABASE DB_NAME DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci 
on your data base

2) change line 


  'collation' => 'latin1_general_ci'


in settings.php to 


  'collation' => 'utf8_general_ci'


and line 


  PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES latin1"


to


  PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES utf8"