Explanation
To decode the secret language, we can match the words from Column I to their jumbled codes in Column II by analyzing word lengths and letter frequencies:
First, match the unique-length words:
The only 6-letter word in Column I is ROTATE, which must map to the only 6-letter code in Column II, lhhpok.
The only 5-letter word in Column I is TREAT, which maps to the only 5-letter code, khlph.
Find the letter T:
In ROTATE, the letter T is repeated twice. In the code lhhpok, the letter h is repeated twice. Similarly, in TREAT, the letter T is repeated twice, matching the double h in khlph. This gives T = h.
Find the letters E, I, R, and A:
The remaining letters in TREAT (T-R-E-A-T) are {R, E, A}, which map to {k, l, p}.
The 3-letter words are TIE, SAY, and SIP, with corresponding codes nls, msr, and hrp.
Since TIE contains T (h), its code must contain h. Thus, the code for TIE is hrp. The remaining letters in TIE are I and E, so {I, E} = {r, p}.
Comparing {R, E, A} = {k, l, p} with {I, E} = {r, p}, the common letter is E = p. This also gives I = r.
Comparing SAY and SIP, both share the letter S, and their codes nls and msr share the letter s. Thus, S = s.
For SIP (S, I, P) with S = s and I = r, the code is msr, which leaves P = m.
For SAY (S, A, Y), the code is nls. Since S = s, we have {A, Y} = {n, l}.
Comparing {R, A} = {k, l} with {A, Y} = {n, l}, the common letter is A = l. This gives Y = n and R = k.
Find the letter C:
The 4-letter words are TAPE, COUP, YEAR, and TYRE, with codes moij, nhpk, nkpl, and pmlh.
Using the decoded letters, we have:
TAPE = {T, A, P, E} = {h, l, m, p}, which matches code pmlh.
YEAR = {Y, E, A, R} = {n, p, l, k}, which matches code nkpl.
TYRE = {T, Y, R, E} = {h, n, k, p}, which matches code nhpk.
This leaves COUP = {C, O, U, P} with the remaining 4-letter code moij.
Since P = m and O = o (from ROTATE), the remaining letters {C, U} map to {i, j}. Therefore, C can be represented by i or j.
Write the sequential code for REACT:
R = k
E = p
A = l
C = i (or j)
T = h
Arranged sequentially, the letters R-E-A-C-T decode to kplih.