Two samples of non-life insurance policies written in English and currently used in Thailand are selected for testing in this study. They are insurance contracts for industrial all risks insurance and puplic liability and products liability insurance. Both insurance types are important types of insursnce widely sold in the market, so the writer would like to investigate the language in them. Industrial all risks insurance is normally purchased to protect against losses or damages to the property of the insured party. The other insurance type is commonly required by manufacturers and exporters who need a protection in case their work or products cause damage or injury to third parties and they have to be responsible for such damage or injury major corporate group take out both kinds of insurance. Since they are policies, widely used, these two types are selected for the readability study.