Yes, absolutely :) Check out this page for how to set it up. If you have any problems, you can always email me and I'll help you.
Thanks for your answer ! Do you have any precise tutorial to set up with Construct ?
Here's a project that shows how to load JSON files and show values: https://editor.construct.net/#open=json. All you have to do is create a dialogue system and just replace the text lines with the ones in the file. I will soon share documentation for the editor, explaining more on how to set it up for different engines, so look out for that.