chore(i18n,learn): processed translations (#53415)

Co-authored-by: Naomi Carrigan <nhcarrigan@gmail.com>
Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-data-structures/check-for-the-presence-of-an-element-with-indexof.md

@@ -10,7 +10,7 @@ dashedName: check-for-the-presence-of-an-element-with-indexof
 
 Since arrays can be changed, or *mutated*, at any time, there's no guarantee about where a particular piece of data will be on a given array, or if that element even still exists. Luckily, JavaScript provides us with another built-in method, `indexOf()`, that allows us to quickly and easily check for the presence of an element on an array. `indexOf()` takes an element as a parameter, and when called, it returns the position, or index, of that element, or `-1` if the element does not exist on the array.
 
-For example:
+예시:
 
 ```js
 let fruits = ['apples', 'pears', 'oranges', 'peaches', 'pears'];

curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-data-structures/check-if-an-object-has-a-property.md

@@ -43,7 +43,7 @@ assert(
 );
 ```
 
-The function `isEveryoneHere` should return `true` if `Alan`, `Jeff`, `Sarah`, and `Ryan` are properties on the object passed to it. 
+The function `isEveryoneHere` should return `true` if `Alan`, `Jeff`, `Sarah`, and `Ryan` are properties on the object passed to it.
 
 ```js
 assert(isEveryoneHere(users) === true);
@@ -119,7 +119,7 @@ let users = {
 
 function isEveryoneHere(userObj) {
   // Only change code below this line
-  
+
   // Only change code above this line
 }
 

curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-data-structures/remove-items-using-splice.md

@@ -10,7 +10,7 @@ dashedName: remove-items-using-splice
 
 Ok, so we've learned how to remove elements from the beginning and end of arrays using `shift()` and `pop()`, but what if we want to remove an element from somewhere in the middle? Or remove more than one element at once? Well, that's where `splice()` comes in. `splice()` allows us to do just that: **remove any number of consecutive elements** from anywhere in an array.
 
-`splice()` can take up to 3 parameters, but for now, we'll focus on just the first 2. The first two parameters of `splice()` are integers which represent indexes, or positions, of items in the array that `splice()` is being called upon. And remember, arrays are *zero-indexed*, so to indicate the first element of an array, we would use `0`. `splice()`'s first parameter represents the index on the array from which to begin removing elements, while the second parameter indicates the number of elements to delete. For example:
+`splice()` can take up to 3 parameters, but for now, we'll focus on just the first 2. The first two parameters of `splice()` are integers which represent indexes, or positions, of items in the array that `splice()` is being called upon. And remember, arrays are *zero-indexed*, so to indicate the first element of an array, we would use `0`. `splice()`'s first parameter represents the index on the array from which to begin removing elements, while the second parameter indicates the number of elements to delete. 예시:
 
 ```js
 let array = ['today', 'was', 'not', 'so', 'great'];