formal style
formal style (estilo formal)
careful, serious language used in essays and reports, with no slang, jokes or texting shortcuts.
Example
The data show a clear decline is formal; The numbers totally tanked is not. (Formal versus informal.)
In Spanish
formal style (estilo formal) — lenguaje cuidadoso y serio que se usa en ensayos e informes, sin jerga, chistes ni abreviaturas de mensajes de texto.
The data show a clear decline is formal; The numbers totally tanked is not. (Formal frente a informal.)