You need to change CSS a bit. Probably you are using RTL. If so than make below changes in RTL css file else LTR CSS
Find below class and make changes
.qa-form-light-button-flag{
...
background-position: 10px center;
}
.qa-form-light-button {
background: #2c3e50 none no-repeat scroll center center;
border: 0 none;
color: #fff;
display: block;
float: right;
font-size: 14px;
height: 32px;
margin: 0 0 0 5px;
padding: 10px 15px 10px 30px; // change padding to something like this
text-align: center;
text-indent: -9999px; // delete indention
transition-duration: 0s;
width: 32px; // delete width
}
So your final code should be something like this
.qa-form-light-button-flag{
background-image: url("images/icons/flag-white.png");
background-position: 10px center;
}
.qa-form-light-button {
background: #2c3e50 none no-repeat scroll center center;
border: 0 none;
color: #fff;
display: block;
float: right;
font-size: 14px;
height: 32px;
margin: 0 0 0 5px;
padding: 10px 15px 10px 30px;
text-align: center;
transition-duration: 0s;
}
If you can't find exact text than try to find class it should be there in both direction css for sure.
Also this example is showing for .qa-form-light-button-flag but you have to go through all buttons class to change the icon position. Usually, all should be in sequence in css file