Er no. Not really. There are conventions. Sometimes conventions are illogical or based on historical misunderstandings, but we still live by them. Just because in some language the word may be spelt or pronounced differently doesn't provide a justification to do so here. A trader must describe his product in the language and according to the norms of the country where he is trading (which is why the UK tried to clamp down on the metric martyrs). If he doesn't do that it's virtually impossible to enforce fair trading and fair description of products and it becomes easier to mislead and confuse the client. In both German and English Halal is the norm and also the dictionary form.
There is a couple of Turkish butchers at Josefstrasse. The closest nearby mainstation (HB) is more expensive but has also a greater variety. We go there nearly every weekend to get nice pieces of veal, beef and lamb. By the way, try the lamb cutlet which is fantastic on the grill just with some turkish spices... but you have to go there early morning since these are running out fast!
A bit further on, crossing the Langstrasse, you'll find another one which is smaller but is OK. If you you'd like to go for seafood instead of meat, try the Indian store just before Langstrasse, great crabs, prawns and plenty of different fishes. Again, we love to go there.
Have you checked the regulations and taxes to be paid on imported meat?
You can only bring 500gr of meat or 3.5kg of poultry for free. Tax for over 500gr meat if 20CHF per kilo, and 13CHF for poultry- so what with transport, petrol, etc. would be very expensive. Good halal meat can be bought in Switzerland, and cheaper in nearby FRance or Germany.
Not trying to be negative about your planned enterprise, but I am afraid that would be the case (eg taxed on the whole lot-to benefit from the free allowance you can only bring it personally, not via a importer/courrier.