Custom language pack for regional Spanish language

I need to translate my application to multiple regional Spanish language. Example : Euskera, Gallego and Valenciano. These languages are not available in the list of the languages available in the localization wizard. How can we translate to custom language?

@SibaniR9 ,

You can customize the languages in the localization wizard list by updating the property Pega-LocalizationTools ruleset. You add the standard Java language locale code and the language name on the table area of the General tab. In your case, please add gl_ES for Gallego. But unable to get the java standard language code for Euskera.

@Vignesh Amarnathan It worked. Thanks