## Part 1
* in any unit config, that has associated database table add following to the `Fields` array:
```
lang=php
'TranslateFrom' => Array (
'type' => 'int',
'formatter' => 'kMultiLanguage', 'db_type' => 'int', 'index_type' => 'int',
'not_null' => 1, 'default' => 0
),
```
* make sure Debug mode is enabled and `DBG_REDIRECT` option is turned on
* press `Rebuild` button in `Rebuild Multilingual Fields` sub-section in {nav Tools > System Tools} section
* confirm, that `Undefined index ...` notice from `multilanguage_helper.php` isn't happening
* confirm, that `ADD INDEX(TranslateFrom)` was used in `ALTER` statement in Debugger Report
## Part 2
* in any unit config, that has associated database table add following to the `Fields` array:
```
lang=php
'TranslateFrom' => Array (
'type' => 'string',
'formatter' => 'kMultiLanguage', 'db_type' => 'varchar(255)', 'index_type' => 'string',
'not_null' => 1, 'default' => ''
),
```
* make sure Debug mode is enabled and `DBG_REDIRECT` option is turned on
* press `Rebuild` button in `Rebuild Multilingual Fields` sub-section in {nav Tools > System Tools} section
* confirm, that `Undefined index ...` notice from `multilanguage_helper.php` isn't happening
* confirm, that `ADD INDEX(TranslateFrom (5))` was used in `ALTER` statement in Debugger Report
## Part 3
* in any unit config, that has associated database table add following to the `Fields` array:
```
lang=php
'TranslateFrom' => Array (
'type' => 'string',
'formatter' => 'kMultiLanguage', 'db_type' => 'varchar(255)',
'not_null' => 1, 'default' => ''
),
```
* make sure Debug mode is enabled and `DBG_REDIRECT` option is turned on
* press `Rebuild` button in `Rebuild Multilingual Fields` sub-section in {nav Tools > System Tools} section
* confirm, that `Undefined index ...` notice from `multilanguage_helper.php` isn't happening
* confirm, that `ADD INDEX(TranslateFrom (5))` was used in `ALTER` statement in Debugger Report