Most of the people in my field are not native English speakers; if he has trouble understanding it, likely they will as well. Is it correct to use it?
No. The purpose of writing is to be understood, if your writing will not be understood then it should be changed. Write to the audience you have, not the audience you want to have.
No. The purpose of writing is to be understood, if your writing will not be understood then it should be changed. Write to the audience you have, not the audience you want to have.