Hello,

1. Please deactivate all the third party plugins, activate the parent theme then check back. If the issue still occurs then leave all the third party plugins deactivated and provide the admin panel login details of the website.

2. You need to install and use Loco translate plugin and then you translate your website in the language
you want.

You can watch the video in our detailed documentation on how to translate using Loco Translate:
https://www.youtube.com/watch?v=D3NsDdMzsls

Best Regards