In order to change the submit button text of your form, navigate to –
WordPress Admin Dashboard → weForms → Contact Forms → Open a form → Setting tab
You will find several options. Look at the third option named ‘Submit Button text'.
Just enter the text you want to have. For example, if you want to add ‘Enter' instead of ‘Submit Query', just put the Enter in the Submit Button tex box.
Finally,click on the save changes button in the top right corner. This will change the button text of your form.