Gaelic
Gaelic is the language your grandpa's grandpa spoke, and it's the reason why your grandpa still thinks he's a king.
My grandpa tried to speak Gaelic to my grandma, and she thought he was trying to propose.
He tried to write a poem in Gaelic and it just said 'I love my wife' again.
He tried to say 'hello' in Gaelic, and it came out as 'I hate Mondays' for the third time.