It is, but only for languages that a person has learned. How well would you do on any test written in Japanese? Assuming you never learned Japanese. Probably

It is, but only for languages that a person has learned. How well would you do on any test written in Japanese? Assuming you never learned Japanese. Probably poorly. But if you knew a little bit of Japanese, you might do fine on a math test. And that's the idea with shape-based tests: trying to minimize the influence that language comprehension has on the results because you want the results to be neutral.