Code Language Translation:
In the given code language, each letter of the word is replaced with a new letter based on a certain pattern. To determine the translation for a word, we need to identify the pattern and apply it to the given word.

Pattern Analysis:
Let's analyze the pattern by comparing the original word "SURGE" with its translation "GITWU":

- The first letter 'S' is translated to 'G'.
- The second letter 'U' is translated to 'I'.
- The third letter 'R' is translated to 'T'.
- The fourth letter 'G' is translated to 'W'.
- The fifth letter 'E' is translated to 'U'.

From this analysis, we can observe that each letter is replaced by the letter that comes three positions later in the English alphabet. For example, 'S' (19th letter) is replaced by 'G' (7th letter), 'U' (21st letter) is replaced by 'I' (9th letter), and so on.

Translation of 'LIGHT':
Now, let's apply the same pattern to the word 'LIGHT':

- The first letter 'L' is three positions later than 'I' (9th letter), so it will be translated to 'O'.
- The second letter 'I' is three positions later than 'F' (6th letter), so it will be translated to 'L'.
- The third letter 'G' is three positions later than 'D' (4th letter), so it will be translated to 'J'.
- The fourth letter 'H' is three positions later than 'E' (5th letter), so it will be translated to 'K'.
- The fifth letter 'T' is three positions later than 'Q' (17th letter), so it will be translated to 'W'.

Therefore, the translation of 'LIGHT' in the given code language is 'OLJKW'.