| Value | Category |
|---|---|
| 1 | Does not understand it |
| 2 | Only understands it |
| 3 | Only understands it and knows how to read it |
| 4 | Only understands it and knows how to speak it |
| 5 | Understands it, knows how to speak it and read it, but cannot write it |
| 6 | Understands it, knows how to speak it, read it, and write it |
| 9 | NIU (not in universe) |
| var_concept.title | Vocabulary |
|---|---|
| Ethnicity and Language Variables -- PERSON | IPUMS |