The language of Thai and Laos most similar. There is a word that is used in both the same and different. For example, time-based greeting met to say hello Thai people said that " sa-wad-dee", but Laos people said that "sa-bai-dee", which the fine words that are similar to the Thai people to answer when someone asked them that how are you? and they are feeling happy, so. The Thai people and Lao people used to say the same. For example, the word goodbye .They said that "la-korn" which he used to say when the farewell.