src/vs/workbench/api/common/extHostLocalizationService.ts/ExtHostLocalizationService/constructor
class ExtHostLocalizationService:	constructor(
		@IExtHostInitDataService initData: IExtHostInitDataService,
		@IExtHostRpcService rpc: IExtHostRpcService,
		@ILogService private readonly logService: ILogService
	) {
		this._proxy = rpc.getProxy(MainContext.MainThreadLocalization);
		this.currentLanguage = initData.environment.appLanguage;
		this.isDefaultLanguage = this.currentLanguage === LANGUAGE_DEFAULT;
	}