How to cite in two languages combined with acronym at the same time in Harvard style
English and German/Italian/etc. are not on the same footing in scientific writing: English is commonly accepted as the international language of science (most, if not all, top journals in all fields are published in English), so writing in English, one uses the appropriate English terms (but giving in addition names of companies in their original language, to make e.g. online searches easier, is totally acceptable). So in such a case (from my own experience), one should go with


  English translated name of company (name of company in the original language, original acronym)


When you write in German, Italian or any other language, the hidden assumption is that you adress the text mostly to the native users of that language, so should make it as easy for them to follow as possible. So in this case one could write


  German/Italian/etc. translated name of company (name of company in original language [e.g. English, but in case of French companies it should be the original French name], original acronym)


with the name and acronym in the original language again to facilitate online searches.