Hello,

Thanks for your feedback,

1) Please follow this post to change the copyright at the footer: https://www.magestore.com/magento-2-tutorial/how-to-change-magento-2-copyright-notice-in-footer/

2) About language, please refer this post to disable the store view that you don't use  and only use one store view, the language bar will gone

https://magento.stackexchange.com/questions/182178/magento-2-how-to-delete-multiple-store-views