I have been studying mandarin Chinese and every times I speak with people of my age or older, they always basically say the same thing: Your Chinese is really great, you speak very well!
I actually beleived that because so many chinese people told me so but one time I spoke with a young child and he could not understand what I said because of my accent…
Then I realised every "grown up" was just telling me that to be polite.
Is there any way for me to know if I speak well or not? Every older people will always tell me that I speak well to be polite so I cannot rely on them. What should I do?