I am going to suggest you watch a few episodes of 'Only Fools and Horses'. It's an 80s sitcom set in Peckham, South London. The show is practically considered a national treasure in the UK and most people who grew up in the UK are very familiar with it. The reason I suggest it is that it showcases a very particular dialect of British English that many people struggle with (even native English speakers) if they aren't…
The show, set in occupied WW2 France, represents different languages by using English in different accents.
A character to particularly look out for is the British secret agent disguised as a French gendarmes. He is able to “blend in” because he “spokes prefect Fronch”.
It’s a great illustration of how much you can mangle English and still be understood ...and is also quite funny.