In several stackexchange areas, I have seen posts like this, where database design is just for the sake of example.
I have a doubt concerning database design.
Where I would have said
I have a question concerning database design.
Is one of the meanings of "doubt" the same as "question" for some English speaking people? I've looked in the dictionary definition and haven't seen anything like it. It's possible that only non native speakers use this.
This is not a question about learning English. There might be an interesting question there, but I just want to know if it's native English or not.