In addition to complete Translation guide included in documentation, here is a little tip if you only want to change text of 1 button as some customers wanted.
Here are the steps to change the text string.
1) Install this https://wordpress.org/plugins/say-what/installation/ small plugin please and activate it.
2) Head over to Tools » Text changes
3) Write View details in original text and howello in domain. and enter DESIRED TEXT in replacement string.
If you face trouble, let me know.