Customize a Wordpress Plugin

I have this Plugin in Wordpress: [login to view URL] [login to view URL] (how plugin works) I need to customize: - Translate all the buttons and text to my language (Portuguese - BR): I provide a file with print-screens of the plugin and the text that I want to translate. - Hide the buttons: EXPORT and PRINT: I want, when the client finish his project, I want that click OK and a little message will appear: "The layout was send to our company, we will email to you your price and how we work". I want to make this to prevent the client to use our layout maker and send a quote for ours competitor. - CLIENT can make the TEXT in CURVE. If possible, I want to client choose if he want the text in horizontal, vertical or curve. - CHANGE COLLECTIONS (this is the most important item). Follow attached a layout created by the company and send for the client, your products are: t-shirts, sweatshirts, college jacket and polo t-shirts. In the current plugin, there is a COLLECTION panel, with differents images of t-shirts. These images are attached on wordpress dashboard (please, watch how the plugin works [login to view URL]) The idea is to create vector products and than the client can change parts of produtcts with the desired color (like: color of hood, sleeve, stripes...). There will be 4 differents products to client choose: t-shirt, hoddie, college jacket and polo t-shirt.