Need a little startup help

[Ricks88]

Hello

I would like to ask some help to get this working.
I'm making use of packages in my configuration.yaml, like:
"packages: !include_dir_named integrations"
in there I have for example: "template: !include_dir_list ../entities/template", where I put all templates.

How do I do this for

custom_templates:
  preload_translations:
    - en
    - nl

Should I link to the custom_templates folder?
I can not link this directly in my configuration.yaml

And where to I put the files to start with the entities I want to translate? Should they be .yaml?

Thanks!