add AccessibilityInformation, https://github.com/microsoft/vscode/issues/129037

src/vs/vscode.proposed.d.ts

@@ -2856,7 +2856,7 @@ declare module 'vscode' {
 		text: string;
 		detail: string;
 		command: Command | undefined;
-		// accessibilityInformation?: AccessibilityInformation; TODO@API
+		accessibilityInformation?: AccessibilityInformation;
 		dispose(): void;
 	}
 

src/vs/workbench/api/common/extHostLanguages.ts

@@ -105,7 +105,8 @@ export class ExtHostLanguages implements ExtHostLanguagesShape {
 					label: data.text,
 					detail: data.detail,
 					severity: data.severity === LanguageStatusSeverity.Error ? Severity.Error : data.severity === LanguageStatusSeverity.Warning ? Severity.Warning : Severity.Info,
-					command: data.command && this._commands.toInternal(data.command, commandDisposables)
+					command: data.command && this._commands.toInternal(data.command, commandDisposables),
+					accessibilityInfo: data.accessibilityInformation
 				});
 			}, 0);
 		};
@@ -154,6 +155,13 @@ export class ExtHostLanguages implements ExtHostLanguagesShape {
 				data.severity = value;
 				updateAsync();
 			},
+			get accessibilityInformation() {
+				return data.accessibilityInformation;
+			},
+			set accessibilityInformation(value) {
+				data.accessibilityInformation = value;
+				updateAsync();
+			},
 			get command() {
 				return data.command;
 			},

src/vs/workbench/contrib/languageStatus/browser/languageStatus.contribution.ts

@@ -270,7 +270,8 @@ class EditorStatusContribution implements IWorkbenchContribution {
 		return {
 			name: item.name,
 			text: item.label,
-			ariaLabel: item.label,
+			ariaLabel: item.accessibilityInfo?.label ?? item.label,
+			role: item.accessibilityInfo?.role,
 			tooltip: new MarkdownString(item.detail, true),
 			command: item.command
 		};

src/vs/workbench/services/languageStatus/common/languageStatusService.ts

@@ -11,6 +11,7 @@ import { ITextModel } from 'vs/editor/common/model';
 import { Command } from 'vs/editor/common/modes';
 import { LanguageFeatureRegistry } from 'vs/editor/common/modes/languageFeatureRegistry';
 import { LanguageSelector } from 'vs/editor/common/modes/languageSelector';
+import { IAccessibilityInformation } from 'vs/platform/accessibility/common/accessibility';
 import { registerSingleton } from 'vs/platform/instantiation/common/extensions';
 import { createDecorator } from 'vs/platform/instantiation/common/instantiation';
 
@@ -25,6 +26,7 @@ export interface ILanguageStatus {
 	readonly detail: string;
 	readonly source: string;
 	readonly command: Command | undefined;
+	readonly accessibilityInfo: IAccessibilityInformation | undefined;
 }
 
 export interface ILanguageStatusProvider {