Specify NLS-Settings during Oracle installation under Windows

Is there an easy way to specify NLS parameters for the database during the installation?

We want to install a new database (environment: Windows). For testing purpose we need NLS settings for nls_language and nls_territory that differ from the default values (German instead of American). To avoid the process of dropping an recreating the database with changed init.ora I would like to specify those setting during a fresh installation on a VM.

I found no settings in the setup dialogue. Is there any way to achieve this?

environment: Oracle Database Enterprise Edition, available versions 11.2 or 12.1.

TIA Fossi