ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Framework.Utilities Namespace / SpellChecker Class / Language Property
Example Version

Language Property (SpellChecker)
Gets or Sets the Spellchecker language per RFC 3066. For example, use en-US for U.S. English or fr-FR for France French.
Syntax
public string Language {get; set;}
Example
SpellChecker s = new SpellChecker(CultureInfo.CurrentCulture.IetfLanguageTag);
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also