The Latin alphabet does not have a single pronunciation. And the vowels are ambiguous across the most common languages so you can't even make an argument that they are intelligible.
I instantly conjure up an image of a Roman citizen, a retired soldier now, speaking Vulgar Latin picking up the phone and dialling Comitia Centuriata to lodge a complaint about a unpaid engagement in Punic Wars.
The Latin alphabet does not have a single pronunciation. And the vowels are ambiguous across the most common languages so you can't even make an argument that they are intelligible.
You've really lost the plot on this one.