This summary is not the rule. The rule text controls.
When someone needs an interpreter in court, that interpreter has to meet the same standards as any other expert witness. This means the court has to check that the person is actually qualified to translate accurately before letting them help out.
The interpreter also has to take an oath or make a formal promise, just like witnesses do. This oath means they're swearing to translate truthfully and accurately, not add their own opinions or change what's being said.
In simple terms, this rule makes sure interpreters are both qualified and honest. It protects everyone in the case, especially someone who doesn't speak English well, by making sure the translation they get is correct and can be trusted.