Also sometimes accent shows because the speaker isn’t sure at real-time how the sentence is “supposed” to be said, and therefore falls back to the way that feel

Also sometimes accent shows because the speaker isn’t sure at real-time how the sentence is “supposed” to be said, and therefore falls back to the way that feels the most natural. So yeah, listen to more people speak, mimic them, and practice repeatedly so it comes through naturally when you need them.