I think OP is sitting on some other product here that he hasn't figured out yet. It definitely isn't in the high-end luxury retail space, but it might be in B2C, think Home assistant or something akin.

the web site was just a test, this product could be really usefull in some places, I'm still trying to find it, do you guys really have any opinion where such product would be usefull? I thought a lot, I tested with luxury for tech companies or hotels, hospitals, this could be really usefull when it comes to languages

Yeah, this type of blatant corner-cutting seems like the exact opposite of what luxury brands would want to represent them.

People will pay more money specifically to _not_ interact with AI, just as they do now when they avoid phone or offshore support. It is already the hallmark of luxury to have a large staff of actual people willing to help you.