add translation for zh-hans (simplified chinese) to profile #2270
Merge branch '2270-baisong' of github.com:openscholar/openscholar into 2270-baisong
set default install language (locale) to 'en' #2270
Merge pull request #3865 from openscholar/2270-baisong

add translation for zh-hans (simplified chinese) to profile #2270