Theme check errors with child theme

I tested the child theme of my theme by Theme Check plugin , I found these errors :

WARNING: More than one text-domain is being used in this theme. This means the theme will not be compatible with WordPress.org language packs. The domains found are mariam, tgmpa.

WARNING: Could not find a copyright notice for the theme. A copyright notice is needed if your theme is licenced as GPL. Learn how to add a copyright notice (opens in a new window).

REQUIRED: This theme text domain does not match the theme's slug. The text domain used: mariam, tgmpa This theme's correct slug and text-domain is mariam-child.

Are there solutions for these errors?