| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| golang.org/x/text/feature/plural | Package plural provides utilities for handling linguistic plurals in text. |
| golang.org/x/text/internal/format | Package format contains types for defining language-specific formatting of values. |
| golang.org/x/text/internal/number | Package number contains tools and data for formatting numbers. |
| golang.org/x/text/language | Package language implements BCP 47 language tags and related functionality. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |