To change the text of feedback review question,positive button label, negative button label, thank you message, already voted message and Submit button value of frontend.

Terminology:

Step 1 First click on Settings menu of Was This Helpful Plugin

Step 2 Now backend Settings page displayed scroll down the page till Text Setting Section.
changetextbackend

1.) To change the Review Question type the question.
2.) To change the Positive Button label type the name of button.You also can use here {yes_count} to count total number of customers/ clients who rated your post or page positive/useful,to get values in percentage(%) use {yes_percentage}. Both the values will appear on your feedback option button.

3.) To change the Negative Button label type the name of button.
You also can use here {no_count} to count total number of customers/ clients who rated your post or page negative/not useful,to get value in percentage(%) use {no_percentage}. Both the values will appear on your feedback option button
4.) To change the Positive Review Response write down positive review response.
5.) To change the Negative Review Response write down negative review response.
6.) To change the Thank You Message write down thank you message.
7.) To change the Already voted message just write down the message.
8.) Even you can change the Submit button value/name write down the submit button value.

Note:- You can replace your Positive Button value in Negative Button value,same Negative Button value in Positive Button value.Example type no,{no_count},{no_percentage} in Positive Button and type yes,{yes_count},{yes_percentage} in Negative Button.

 Placeholder:-

{yes_count}=> count the total number of positive feedback.

{yes_percentage} => Count the total number of positive feedback in percentage(%).

{no_Count}=> Count the total number of negative feedback.

{no_percentage}=> Count the total number of negative feedback in percentage(%).

Step by step explanation of each point
Example:
As an IT Company developed a new plugin and wants to launch in a Market. Before placing it in market ,company distribute plugin to staff members so they can get quality and reviews of plugin.

1.) Ask question:- Do you like this plugin.
2.) Ans : Yes/Best
or
3.)Ans : No/Bad
4.)What you like most in this plugin.
5.) What is worst thing in plugin.
6.)Thank you for your positive or negative review.
7.) No one can review more then two times.
8.) Submit your reviews.

Now click on Save Setting button at the bottom of Settings page.
changetextfrontend

1.)The text of question updated in Was this helpful ?.
2.) Positive Button label name updated in yes
3.) Negative Button label name updated in no
4.)Positive Review Response text updated Well Done! Please leave your positive feedback..
5.) Negative Review Response text updated in What was wrong? Please help us.
6.) Thank You Message updated in Thank You for your feedback.
7.) Already voted message updated in You have already provided feedback for this post.
8.) Submit Button name updated in Submit

Video Tutorial