Thanks for your correction.

In Fact we are not native english speakers. Does it mean we don't know our market of activity more than very well? Does it mean we did'nt do a great job in the past 4 years? Or does our english spelling allow any conclusions about the quality of our project? Yes, it does. It shows that we can quickly learn a language und make it not perfect but understandable for others, if we need it. It is a good performance. Which we by the way would also appreciate from every foreigner who managed to learn german just cause its useful.