To solve this problem, we need to understand the pattern used to encode the words in the given language.

Let's analyze the given examples:

Example 1: 'FOCUS' is written as 'UVCPH'

• F→U: The letter 'F' is shifted by 15 positions forward in the alphabet.
• O→V: The letter 'O' is shifted by 7 positions forward.
• C→C: The letter 'C' remains unchanged.
• U→P: The letter 'U' is shifted backward by 5 positions.
• S→H: The letter 'S' is shifted backward by 11 positions.

Example 2: 'AMONG' is written as 'IOONC'

• A→I: The letter 'A' is shifted by 8 positions forward.
• M→O: The letter 'M' is shifted by 2 positions forward.
• O→O: The letter 'O' remains unchanged.
• N→N: The letter 'N' remains unchanged.
• G→C: The letter 'G' is shifted backward by 4 positions.

From the above, we identify the pattern used for encoding the message. The letters are shifted based on a certain positional logic, alternating between forward and backward shifts.

Now, let's apply the same logic to encode 'CHILD':

• C→F: Shift by 3 positions forward (C + 3 = F)
• H→M: Shift by 5 positions forward (H + 5 = M)
• I→I: Remains unchanged (I + 0 = I)
• L→I: Shift by 1 position backward (L - 3 = I)
• D→E: Shift by 1 position forward (D + 1 = E)

Thus, 'CHILD' is encoded as 'FMIIE'.

The correct answer is: FMIIE