No. Translation dictionaries cannot be used during a Pearson VUE OnVUE online‑proctored exam, even for ESL (English as a Second Language) candidates.
Dictionaries of any kind are prohibited for OnVUE exams, as the online environment requires a strict clean‑desk/clean‑room setup with no books, papers, or reference materials allowed.
If a candidate requires a translation dictionary as an approved accommodation, they must take the exam at a Pearson VUE test center, where such accommodations may be permitted under specific conditions.
See Can I Use a Dictionary During My Exam?