Please find below example code and update your customized publication Type in Tridion.ContentManager.config file and restart services. 

 \tridion\config\Tridion.ContentManager.config
 
 <publicationTypes>
      <!-- 
      Constraints: 
          1) id and name attribute is unique. 
          2) id > 1024. Numbers below 1024 are reserved.
          3) titleResource is optional. if titleResource is not provided then the value specified in name will be used as PublicationType.Title
      -->
      <add id="1" name="Content" titleResource="lblContentPublicationType" />
      <add id="2" name="Web" titleResource="lblWebPublicationType" />
      <add id="4" name="Mobile" titleResource="lblMobilePublicationType" />
      <add id="5" name="SiteType" titleResource="lblSiteTypePublicationType" />
    </publicationTypes>