Fixed comment: Change outer product of caesar with each.
Fix comment: Add description on difference of ⍴ and ≢
Fix comment: Do not introduce ⎕ML 3 here
Fix comment: Use member instead of ∘.≡
Fix comment: Not necessary to create text and then reduce it
Fix comment: Remove superfluous ⊂ and ↑
Fix comment: where does the variable english come from
Fix comment: Use format by specification to get 2 decimals
Fix comment: Mention ∘ and currying