-The Lao writing system evolved from Sanskrit. It was first taken by the Khmers during the time of the Angkor Empire then adapted by the Laotians, Northern Thais, and Central Thais into individual though similar alphabets. These alphabets are composed of letters with their own sounds, and are read from left to right like English.
-The Lao alphabet has been reformed several times over the past 50 years. The number of consonant letters was reduced so that words can be read phonetically. This was done so that non-Lao ethnic groups could read the language more easily. The result is that the Lao system doesn't follow Sanskrit as closely as Thai in the spelling of high-level (religious, academic) words, so the Sanskrit origin can't be seen.
Credit to http://www.thailao.net/laofacts.htm
-The Lao alphabet has been reformed several times over the past 50 years. The number of consonant letters was reduced so that words can be read phonetically. This was done so that non-Lao ethnic groups could read the language more easily. The result is that the Lao system doesn't follow Sanskrit as closely as Thai in the spelling of high-level (religious, academic) words, so the Sanskrit origin can't be seen.
Credit to http://www.thailao.net/laofacts.htm