The vast majority of U.S. personal income tax returns are prepared by software, even paper-filed returns. As stated elsewhere, yes the instructions do specify

The vast majority of U.S. personal income tax returns are prepared by software, even paper-filed returns. As stated elsewhere, yes the instructions do specify the descriptors used for dependents. Interestingly, "grandchild" "stepchild", and "foster child" is allowed. "A qualifying child is a child who is your... Son, daughter, stepchild, foster child, brother, sister, stepbrother, stepsister, half-brother, half sister, or a descendant of any of them (for example, your grandchild, niece, or nephew)"