Welcome to the forum. Your English
is just fine and you have no need to apologize. Just don't ask me to reply to you in French.
Building a boat from stainless steel
sounds very interesting. I looked at your website and learned a little about your project
but regret my French is very limited and my technical French does not exist.
Would love to hear more details of the design and construction. For example, what type stainless are you using? Will you use the same alloy throughout the boat? Will you paint
or leave bare? How will you deal with passivation of such a large structure?
Maybe that's enough for now.
Good luck in your project
and we look forward to seeing on the water