"I have gone out."
Translation:Dw i wedi mynd ma's.
Dw i is more traditional and makes more sense since it was originally "Rydw i", but dwi is what most young people use I would say. They are interchangeable.
If you're talking at normal speed, is there much of a difference between how they're pronounced?
not between "dwi" and "dw i", but the emphasis changes with "Rydw i" onto the "Ry" because of how Welsh words are emphasised and the "i" is more separate when it's "Rydw i" as opposed to how "dw i" is more one word (sounds like "dwee") which is why the "dwi" spelling now exists.
Yes. The more 'standard' word is allan, but ma's is widely used as well, especially in parts of west and south Wales.