src/vs/platform/localizations/node/localizations.ts/LocalizationsService/onDidInstallExtension
class LocalizationsService:	private onDidInstallExtension(extension: ILocalExtension | undefined): void {
		if (extension && extension.manifest && extension.manifest.contributes && extension.manifest.contributes.localizations && extension.manifest.contributes.localizations.length) {
			this.logService.debug('Adding language packs from the extension', extension.identifier.id);
			this.update().then(changed => { if (changed) { this._onDidLanguagesChange.fire(); } });
		}
	}