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.

Done!

If you face trouble, let me know.