Is "laic" an alternative word to the word "layperson"? [closed]

Solution 1:

No, not if you want anyone to know what you’re talking about.

Laic is a very rare, formal, ecclesiastic term that virtually no one outside the extremely well educated have ever even heard of, let alone used. Laic is to laity as cleric is clergy. Most people don’t know who the laity even are, not to mention their laic representatives. Almost anyone who does probably knows the original Latin laicus, and just how many do you reckon know that word?

Laic is one hundred times less frequent than layman in Google ngrams, and the plural laics is thrice rarer still.

If the intent is communication, you should not use these terms outside the exceedingly narrow context of papal bulls and other equivalently religious epistles.