Migrations dependencies: run one by one?
First of all, you only need two yaml files, one for the default language and one for the translations.

If you are migrating for example a content type of bundle pages and your default language migration is eg. my_website_migrate_node_page, then in the my_website_migrate_node_page_translation define your dependencies as follows

migration_dependencies:
  required:
    - my_website_migrate_node_page
  optional: { }