There is no legal definition for isolate extracted from pea. 

NUTRALYS® pea protein is a very highly purified protein ingredient. We recommend that our customers mention pea protein on their product labels. It is 85% protein on average (on dry matter basis) and can be considered as a pea isolate (soya protein extraction leads to 90% protein isolate, pea protein to 85% as pea has a lower protein content than soy).