Clients like plain English because it makes them feel smart and less frustrated with their lawyer. When discussing the contract with their potential customer, they don't have to be embarrassed or apologetic about the document. A contract is often used as part of selling your client's products or services, or a deal that your client wants to complete. People won't sign a deal they don't understand. Instead, they study, delay, or procrastinate-all of which costs time and money.
Lawyers give advice more quickly on contracts they understand.
On the other hand, if the prospective contracting partner can't understand the contract, their lawyer now has a hunting license to scrutinize closely, find problems, and make substantive comments detrimental to your client. Since contracts in legalese take longer to review, they can delay your client's deal. If the client perceived that a wordy document caused the delay, the client may want to change lawyers. When people negotiate a business deal, they usually want to create a friendly, cooperative atmosphere with their prospective business partners. A plain-English contract helps to do this by creating a businesslike tone.