idomatically

Try this:
Your writing does not sound natural.

Thank you,teechr.

I wanted to the student know what idiomatic is for most here think idiomatic is do with idioms.

vsureshYour English is not idiomatic; that is, the ideas are not expressed as they should be expressed in English.

I would use a semi-colon there. I would also leave out the idea of "should", writing instead not expressed as they are [naturally / typically] expressed in English. Either "naturally" or "typical

vsureshComment on a writing work:

Comment on written work:

vsureshI wanted to the student know what idiomatic is, for most here think idiomatic is has to do with idioms.

Yes. That's a typical problem. If you explain it enough times, however, they'll eventually understand the difference.

CalifJimI would use a semi-colon there. I would also leave out the idea of "should", writing instead not expressed as they are [naturally / typically] expressed in English. Either "naturally" or "typically" would fit there.

I understand. Thank you, CJ.