Is it unethical to poorly translate an exam from Dutch to English and then present it to the English speaking students? There are two tracks for my field of study. One is taught in Dutch and the other in English. This is in the Netherlands.  A while ago we had to take a multiple choice exam in English, which looked a bit odd. The sentence construction of the questions makes little sense at first glance, and it took a while to even grasp the content. Furthermore, it seemed quite obvious that the exam was only roughly translated (possibly by a machine) as the exam just sounded as if someone used a thesaurus to make it. In addition some of the answer options were still in Dutch, which made it extremely difficult to understand the content. Moreover, some questions had literally the same answer option twice. 

So in summary, the students in the English track took the botched translation version, while the students in the Dutch track took the Dutch version.

Is it unethical to give English speaking students a poorly translated version of the same exam that the Dutch students receive?
There are two different questions in here that are mixed up: one about whether the Dutch and English exams should be identical and one about exam quality.

Regarding the first question: I fail to see why this should be unethical. On the contrary: It seems very good that the standards on what you are supposed to know are the same. After all, you get the same degree.

Regarding the second question: Also here, the answer is obvious: Of course, exams need to be of good quality. If that is not the case, sure, this is a problem to be addressed. But that has nothing to do with the question of whether they are a translation or not.