Lists data fields that differ from the last major version (see versions above). Inherited differences in locales are suppressed, except where the source locales are different.
| Section | Page | Header | Code | Locale | Old | New | Level |
| Core Data | Alphabetic Information | Characters in Use | Main Letters | cv | [] | [а-яёҫӑӗӳ] | core |
| Locale Display Names | Languages (A-D) | C | Chuvash ► cv | cv | чӑваш | basic |
| Territories (Europe) | Eastern Europe | RU | RU | Раҫҫей |
| Date & Time | Fields | Date Fields | era | Era | эра | moderate |
| year | Year | ҫул |
| month | Month | уйӑх |
| week | Week | эрне |
| day | Day | кун |
| hour | Hour | сехет |
| minute | Minute | минут |
| second | Second | секунд |
| Gregorian | Formats - Standard - Date Formats | full | y MMMM d, EEEE | EEEE, d MMMM y 'ҫ'. |
| long | y MMMM d | d MMMM y 'ҫ'. |
| medium | y MMM d | d MMM y 'ҫ'. |
| short | y-MM-dd | dd.MM.y |
| Formats - Flexible - Date Formats | MEd | MM-dd, E | E, dd.MM |
| MMMEd | MMM d, E | ccc, d MMM |
| Formats - Flexible - 12 Hour Time Formats | Ehms | E h:mm:ss a | E h:mm:ss a |
| hm | h:mm a | h:mm a | basic |
| hms | h:mm:ss a | h:mm:ss a |
| hmsv | h:mm:ss a v | h:mm:ss a v |
| Numbers | Symbols | Symbols | decimal | . | , |
| group | , | |
| Number Formatting Patterns | Standard Patterns | standard-currency | ¤ #,##0.00 | #,##0.00 ¤ |
| standard-percent | #,##0% | #,##0 % |
| Currencies | North America (C) | Northern America: United States | USD-symbol | US$ | $ | moderate |
| Southern/Eastern Europe | Eastern Europe: Russia | RUB-name-other | RUB | Раҫҫей тенки |
| RUB-name | Раҫҫей тенкӗ |
| RUB-symbol | ₽ |