diff --git a/API-Reference.md b/API-Reference.md
index 5b6b8e6..bbb8236 100644
--- a/API-Reference.md
+++ b/API-Reference.md
@@ -391,7 +391,7 @@ will write the following string to the serial output:
 
 Removes the element at the specified index.
 
-**IMPORTANT**: This function doesn't free the memory allocated to the element in the `JsonBuffer`. This behavior has been prefered to keep the `JsonBuffer` fast and small, which is a fundationnal principle of the library.
+**IMPORTANT**: This function doesn't free the memory allocated to the element in the `JsonBuffer`. This behavior has been prefered to keep the `JsonBuffer` fast and small, which is a foundational principle of the library.
 
 ##### Signature
 
@@ -1071,7 +1071,7 @@ will write the following string to the serial output:
 
 Removes the element at the specified key.
 
-**IMPORTANT**: This function doesn't free the memory allocated to the element in the `JsonBuffer`. This behavior has been prefered to keep the `JsonBuffer` fast and small, which is a fundationnal principle of the library.
+**IMPORTANT**: This function doesn't free the memory allocated to the element in the `JsonBuffer`. This behavior has been prefered to keep the `JsonBuffer` fast and small, which is a foundational principle of the library.
 
 ##### Signatures