Remove nesting, exported language and fix 1.2 specs

- Removed nested describe inside describe
- Reset Language to "en-US" since it was crashing the Date.Extras Spec
'should return a readable description of the age of a date' which was
returning the correct day but in French
- commented with `//<1.2compat>` specs that should be commented
Merge pull request #1246 from SergioCrisostomo/spec-fix-locale

Remove nesting, exported language and fix 1.2 specs