C:\Users\Administrator>cocos new helloworld -l
Running command: new
usage: cocos new -h] -p PACKAGE_NAME] -l {cpp,lua,js} -d DIRECT
-t TEMPLATE_NAME] --ios-bundleid IOS_BUNDLEID]
–mac-bundleid MAC_BUNDLEID] -e ENGINE_PATH] -
–no-native]
cocos new: error: argument -l/–language: expected one argument