A learner may understand a scientific relationship yet fail to show it when a test uses unfamiliar vocabulary and dense sentences. The score then reflects both subject knowledge and language proficiency. That is suitable for a language test, but it can distort a science or mathematics result.
A fairer assessment can use clear wording, visual support, a bilingual glossary or several ways to explain reasoning. These supports should be documented so the standard remains transparent. The aim is not to lower expectations. It is to remove an accidental barrier while protecting the construct that the test is meant to measure. Assessment design should protect the meaning of the score. Documenting each support also helps later reviewers decide whether scores remain comparable, meaningful and useful. It makes review more consistent.