My Dad has informed me that it was my Great Grandma and Great Grandpa who were born in Slovenia. They met as teenagers or young adults in the US. My Grandma did learn her English in school though.
My parents have been scanning old pictures lately, and here is one they just sent over. My Great Grandpa is in the center.
They are playing Balinca, a Slovenian version of Bocce Ball. Yes, I had to Google both of those.