I have noticed this error in non-native speakers more and more recently**, but I don't know how to explain it, i.e., I don't know what this phenomenon is called nor what the rule is. An example:
Does this work?
Yes, that works.
Note the change from work to works. I think generally this happens when we go from declarative to interrogative but I'm not sure. It also doesn't seem to happen to the first person:
Do I run every morning? Yes, I run every morning.
Does he run every morning? Yes, he runs every morning.
**The error is when people do not do this, e.g., "Yes, that work."