Thank you very much for your answer. We are building a product for printing companies and we are looking for a solution for order design. We are building on Magento - PrintShop theme.
I have one more question. The customer uploads a photo when designing. Will the file be uploaded in full resolution? Do I need to upload a photo to a full resolution at another location?
Are there any demos available? We got another designer demo, but your product is more suited to our solution.

Hello Przemek,
Many thanks for your interest in our plugin.
I am Vincent from Customer Service department. It is my pleasure to support you in this case.
Yes, our Premium Online Product Designer Extension for Magento 1 & 2 does support multi-language. You can translate into your language with the support of our dev team. Don't worry about it.

if you have any questions, feel free to let me know.

Best regards,
Vincent Ray
Email: [email protected]
Skype: [email protected]
Phone: +84868901261

Hi Przemek,
Yes, the file will be uploaded in full resolution.
You can refer the demo for online design at below link:
http://preview.cmsmart.net/demo/magento-premium-online-product-designer-extension
Or else, you can take a quick look on our magento printshop solution package at http://demo4.cmsmart.net/printshop/
If you have any questions, feel free to let me know

Best regards,
Vincent