diff --git a/compiler.h b/compiler.h
index a993fe6..92502bc 100644
--- a/compiler.h
+++ b/compiler.h
@@ -115,8 +115,8 @@ struct token
         int type;
     } num;
 
-    // True if their is whitespace between the token and the next token
-    // i.e * a for operator token * would mean whitespace would be set for token "a"
+    // True if there is whitespace between the token and the next token
+    // e.g. * a for operator token * would mean whitespace would be set for token "a"
     bool whitespace;
 
     // (5+10+20)
diff --git a/helpers/vector.h b/helpers/vector.h
index 5f5f277..d968532 100644
--- a/helpers/vector.h
+++ b/helpers/vector.h
@@ -54,7 +54,7 @@ void vector_unset_flag(struct vector* vector, int flag);
 void vector_pop_last_peek(struct vector* vector);
 
 /**
- * Peeks into the vector of pointers, returning the pointer value its self
+ * Peeks into the vector of pointers, returning the pointer value itsself
  * 
  * Use this function instead of vector_peek if this is a vector of pointers
  */
diff --git a/parser.c b/parser.c
index 4af93a8..42dc622 100644
--- a/parser.c
+++ b/parser.c
@@ -894,7 +894,7 @@ void parser_ignore_int(struct datatype *dtype)
 
     if (!parser_is_int_valid_after_datatype(dtype))
     {
-        compiler_error(current_process, "You provided a secondary \"int\" type however its not supported with this current abbrevation\n");
+        compiler_error(current_process, "You provided a secondary \"int\" type however it's not supported with this current abbrevation\n");
     }
 
     // Ignore the "int" token
diff --git a/preprocessor/preprocessor.c b/preprocessor/preprocessor.c
index fa876a1..496ce1c 100644
--- a/preprocessor/preprocessor.c
+++ b/preprocessor/preprocessor.c
@@ -465,7 +465,7 @@ bool preprocessor_is_preprocessor_keyword(const char *value)
            S_EQ(value, "warning") ||
            S_EQ(value, "error") ||
            S_EQ(value, "if") ||
-           S_EQ(value, "eleif") ||
+           S_EQ(value, "elif") ||
            S_EQ(value, "ifdef") ||
            S_EQ(value, "ifndef") ||
            S_EQ(value, "endif") ||
@@ -621,7 +621,7 @@ void preprocessor_definition_remove(struct preprocessor *preprocessor, const cha
 }
 struct preprocessor_definition *preprocessor_definition_create(const char *name, struct vector *value_vec, struct vector *arguments, struct preprocessor *preprocessor)
 {
-    // Unset the definition if its already created
+    // Unset the definition if it's already created
     preprocessor_definition_remove(preprocessor, name);
 
     struct preprocessor_definition *definition = calloc(1, sizeof(struct preprocessor_definition));
@@ -880,7 +880,7 @@ struct token *preprocessor_hashtag_and_identifier(struct compile_process *compil
 }
 
 /**
- * @brief Return true if their is a hastag and any type of preprocessor if statement
+ * @brief Return true if there is a hastag and any type of preprocessor if statement
  * elif is not included.
  *
  * @param compiler
@@ -1237,7 +1237,7 @@ int preprocessor_macro_function_push_something_definition(struct compile_process
         return 0;
     }
 
-    // We failed so theirs no argument
+    // We failed so there's no argument
     struct preprocessor_definition *arg_definition = preprocessor_get_definition(compiler->preprocessor, arg_name);
     if (arg_definition)
     {
diff --git a/resolver.c b/resolver.c
index 007da56..53cdfd6 100644
--- a/resolver.c
+++ b/resolver.c
@@ -713,7 +713,7 @@ void resolver_build_function_call_arguments(struct resolver_process *resolver, s
         struct datatype *dtype = resolver_get_datatype(resolver, argument_node);
         if (dtype)
         {
-            // 4 bytes unless its a structure
+            // 4 bytes unless it's a structure
             stack_change = datatype_element_size(dtype);
             if (stack_change < DATA_SIZE_DWORD)
             {