In English please!
“Deceased” – the person who has died.
“Mourner” – a person who goes to a Funeral to say their final goodbyes.
“Interment” – the burial of a body or someone’s ashes.
The Funeral industry like any industry, has its own professional jargon. You’ll never catch me using it in any of my material though. I avoid it like the plague because quite simply, there’s no need for it.
I’ll use the language that we’re all familiar with and that everyone understands.