delphiandomine - I am in Wroclaw now. Good points! Absolutely agree. My business partner is Polish ( I am Asian) and he is so confident about this chinese school, insists that those Managers will learn English and Chinese at the SAME TIME as the lesson will be conducted in English.
I think this is a dangerous assumption to make, because the languages are so incredibly different. I know there's good arguments for/against using the native tounge in the classroom - but I fear without rigid lesson plans, it could easily end up being disjointed.
It's an interesting concept, and thinking about this further, if you had a Polish teacher alongside the Chinese teacher, then it very well may work - I think it's probably too complicated for a Chinese/English speaker to be able to deal with effectively, but add in a Polish/English teacher with strict lesson plans and it might, just might work wonderfully.
I went around the language schools in Wroclaw and being told that nobody is interested in Chinese, just wondering if those language schools have not done a good job in marketing, etc. I can't really find a chinese teacher who can speak Polish in Poland. I have given out 100 copies of questionnaire, lets see if the result is positive.
You're definitely doing your homework here :)
The problem, as I can see, would be the costs. You would almost certainly have to write your own 'method' for the school to begin with, in order to make sure that the lessons were structured enough to work under the English/Polish banner. On top, as you've already seen, there's not much demand for Chinese being taught - and I'm certain that if there was a demand, schools like Profi-Lingua would advertise some dreadful course in it.
I would steer clear of the school idea for now, personally - it's just too risky to focus on a language like Chinese when many people in Poland don't have another language - English and German is unfortunately dominant. It's the kind of idea that might work in Warsaw - but Wrocław is likely to just be too small for it. To give some comparison, Poznan isn't much smaller and is regarded as being the business capital of Poland, yet there's nothing here in the way of Chinese language provision.
What I would do is look at the languages of communication between Europe and Asia - what's being used, why is it being used, etc. That might tell you all you need to know.