Extract Text after 2 commas in a string

select MemberGroupLangStr
, CHARINDEX(',',MemberGroupLangStr)
, substring(MemberGroupLangStr,CHARINDEX(',',MemberGroupLangStr)+1 , len(MemberGroupLangStr))
, CHARINDEX(',',substring(MemberGroupLangStr,CHARINDEX(',',MemberGroupLangStr)+1 , len(MemberGroupLangStr)))
, CHARINDEX(',',MemberGroupLangStr) + CHARINDEX(',',substring(MemberGroupLangStr,CHARINDEX(',',MemberGroupLangStr)+1 , len(MemberGroupLangStr)))
, substring(MemberGroupLangStr , CHARINDEX(',',MemberGroupLangStr) + CHARINDEX(',',substring(MemberGroupLangStr,CHARINDEX(',',MemberGroupLangStr)+1 , len(MemberGroupLangStr))) + 1 , len(MemberGroupLangStr))
From MembersWithUnapprovedTextAttributes