You are legally entitled to an interpreter when being questioned by police or while in court. I believe the claims in the article are exaggerated, I would speculate intentionally so as the author is an engagement-farming content creator who has made several videos about the subject garnering hundreds of thousands of views. Of course, it is possible their experience was worse than what they are legally entitled to -- the real world often doesn't live up to ideals and legal rights can be violated -- but they speak in broad generalizations about the system as a whole that are not representative.