I got a soft reject with this comment:
“The theme uses the add_shortcode() function. Custom post-content shortcodes are plugin-territory functionality.”
I tried to use “TGM-Plugin-Activation” but theme checker gives another error:
“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 xxx, tgmpa”.
I downloaded a fresh copy of TGMPA using the Custom Generator and wrote my textdomain but “class-tgm-plugin-activation.php” no matter contains “tgmpa”.