Language Proficiency
Digital language certification exams
2 exams, 1 with a pass rate published by the body that sets them. The cheapest is PTE Academic at $200-$250.
PTE Academic
Pearson
$200-$250·N/A (score-based) pass
Hard2 years
Fully computer-based including speaking
Cambridge English (FCE/CAE/CPE)
Cambridge Assessment
$200-$280·~70% pass
HardLifetime
FCE (B2), CAE (C1), CPE (C2)