Change Submit button text

Hi,

I have two questions regarding the customization of this plugin.

How can I change the text of the “Submit” button? I’m looking to modify this part of the code: <input type=”submit” name=”gwolle_gb_submit” class=”gwolle_gb_submit button btn btn-primary” value=”I WANT THIS TO BE MY VALUE”>

and my second question, Is there a way to change the label of the textarea element. Part of code here: <label for=”gwolle_gb_content” class=”text-info”>I WANT TO CHANGE THIS TEXT TO MY CUSTOM LABEL<span class=”required”>*</span></label>

I know I can achieve this by editing the file located in /frontend/gb-form.php, but my modyfications will be overwritten after the plugin update. Also I know that I can create childtheme and store modyfication in there, but I think it’s not a good idea.

I’ve heard that there are some modifications for WordPress called hooks or filters(?), but I’m not able to write the code as I’m not a php programmer, and I just don’t understand how it works.

Could you please help me to solove this little problem?