It's true that it's important for interpreters to translate all words that are spoken. And, as Mr. Lymburner just said, it's important not to add any words. There are some key moments in political debate. Some words are unparliamentary. Even so, the interpreter should render them because otherwise, people who speak the other language will not have heard them. This happened recently in the House of Commons, and it led to important decisions.
On May 30th, 2024. See this statement in context.