Languages written with Lao script
| Language | Writing System Code | Writing System Status | SLDR/CLDR locale | Regional variants |
|---|---|---|---|---|
| Alak | alk-Laoo | unwritten | alk-Laoo-LA (Laos) | |
| Brao | brb-Laoo | in use | brb-Laoo-LA (Laos) | |
| Bru, Eastern | bru-Laoo | in use | bru-Laoo-LA (Laos) | |
| Bru, Western | brv-Laoo | in use | brv-Laoo-LA (Laos) | |
| Hmong Daw | mww-Laoo | in use | mww-Laoo-LA (Laos) | |
| Hmong Njua | hnj-Laoo | in use | hnj-Laoo-CN hnj-Laoo-LA (Laos) | |
| Iu Mien | ium-Laoo | in use | ium-Laoo-LA (Laos) | |
| Jeh | jeh-Laoo | in use | jeh-Laoo-LA (Laos) | |
| Katang, Northern | ncq-Laoo | in use | ncq (SLDR)  | ncq-Laoo-LA (Laos) |
| Katang, Southern | sct-Laoo | in use | sct (SLDR) | sct-Laoo-LA (Laos) |
| Katu, Western | kuf-Laoo | obsolete | kuf-Laoo-LA (Laos) | |
| Khmu | kjg-Laoo | in use | kjg-Laoo-LA (Laos) | |
| Kriang | ngt-Laoo | in use | ngt-Laoo-LA (Laos) | |
| Kuay | kdt-Laoo | in use | kdt-Laoo-LA (Laos) | |
| Lao | lo-Laoo | in use | lo (CLDR) | lo-Laoo-LA (Laos) |
| Laven | lbo-Laoo | unwritten | lbo-Laoo-LA (Laos) | |
| Mambila, Cameroon | mcu-Laoo | in use | mcu-Laoo-CM (Cameroon) | |
| Oy | oyb-Laoo | in use | oyb-Laoo-LA | |
| Pacoh | pac-Laoo | in use | pac-Laoo-LA-x-diacado (Laos) | |
| Phuan | phu-Laoo | in use | phu-Laoo-LA (Laos) | |
| Phunoi | pho-Laoo | in use | pho-Laoo-LA (Laos) | |
| Rmeet | lbn-Laoo | in use | lbn-Laoo-LA (Laos) | |
| So | sss-Laoo | obsolete | sss-Laoo-LA (Laos) | |
| Sou | sqq-Laoo | unwritten | sqq-Laoo-LA (Laos) | |
| Tai Dam | blt-Laoo | in use | blt-Laoo-LA (Laos) | |
| Ta’oih, Lower | tto-Laoo | in use | tto-Laoo-LA (Laos) | |
| Ta’oih, Upper | tth-Laoo | in use | tth-Laoo-LA (Laos) |