As an actual Cajun, I would have to ask are they speaking English or Cajun English? Because the first you just run into their accent as difficulty, while with the second lots of things make no sense even if you understand the words and it gets worse with the odd bits from Cajun French thrown in.
How many people understand what "Making groceries" or "Get down" means? They mean Go grocery shopping and Let out of vehicle.
If told to "Save the [object]", you are being directed to store it in its proper place. So "Save the dishes" means put them in the cabinet.
If someone says "Come see", they are saying come here and don't actually have something for you to look at.
"Shut face" means to be quiet, even if you weren't talking. It sounds like "shoe fae". The phrase "Sit butt and shut face" means sit still and be quiet, sounding like "See twa eh shoe fae". It is specific to Cajun English, with words that sound completely different in Cajun French.
How about "Pass a" [time] (sounds like "pass'ah"). That means Hang out/spend time together. The most commonly mentioned online is "pass a good time", though the [time] could be nearly anything from units (hour) to things like spell.
A "yea" at the end of an action answer is common as a counter-question requesting participation. So if you asked someone what they were doing and they answered "gone fishing yea", they are saying they are going fishing and offering participation to you.
Several sounds are clipped or dropped, making some things very hard to understand. “Dis,” “dat,” “dese,” and “dose” for "this", "that", "these", and "those". Hair is "air" and hand is "and", since the "H" sound is commonly dropped. Is and are are not commonly used ("what you do" or "what you doing" instead of "what are you doing"). "For" is used instead of "at" when discussing time.