Vocal Voices

I am watching a programme on TV and the person interviewed is speaking in their own language - Japanese. The interpretation is spoken by someone speaking in English, but with a local accent. It is almost as alien and understandable as the original.

Why cannot the interpretation be in a form of English we can all understand? It is not an uncommon thing to hear.

That bugs me too, interpretation as I understand it, should be via someone of the language being interpreted into

I do know what you mean, and also find it irritating!