I hope you are well today and thank you for your question.
You can translate them either by translating theme or by using following plugin change it.
Solution for this topic
I could confirm the issue on my test site that the buttons text are not translation ready therefore notified the theme developer about this so that it will be fixed.
The issue will be fixed ASAP.
In the meanwhile you can try resolving the issue by changing the text in the following code and then adding that code in the functions.php file of Gillion child theme.