I would like to know where and how you added the slider widget to your page or content template or you are using any addon Elementor widget plugin that offers the slider.
Maybe few screenshot will help to know how exactly you configured your slider with your home page, can you please send me those screenshots?
I would need to take a closer look at your site. So I would need to request temporary access (WP-Admin and FTP) preferably to a test site where the problem has been replicated if possible in order to be of better help and check if some configurations might need to be changed.
=> hidden link
IMPORTANT: Please, note, a backup is required for security reasons, and to avoid any data loss, you can use the https://wordpress.org/plugins/updraftplus/ plugin for these backup needs.
✙ I would need your permission to de-activate and re-activate Plugins and the Theme and to change configurations on the site if needed. This is also a reason the backup is critical.
What if you try to complete the translation for all slider elements like title, heading, description from the following link and complete the translation:
=> hidden link
