diff --git a/docs/keycodes.md b/docs/keycodes.md
index 6d44f30..c593d47 100644
--- a/docs/keycodes.md
+++ b/docs/keycodes.md
@@ -165,6 +165,31 @@
 |`KC.RIGHT_ANGLE_BRACKET`|`KC.RABK`, `KC.GT` |`>`                |
 |`KC.QUESTION`           |`KC.QUES`          |`?`                |
 
+## [Internal Keys]
+
+|Key                     |Aliases                      |Description            |
+|------------------------|-----------------------------|-----------------------|
+|`KC.NONUS_HASH`         |`KC.NUHS`                    |ISO Right of LSHIFT    |
+|`KC.NONUS_BSLASH`       |`KC.NUBS`                    |ISO Left of Return     |
+|`KC.APPLICATION`        |`KC.APP`,`KC.SEL``KC.WINMENU`|Menu Key (Near RALT)   |
+|`KC.INT1`               |`KC.RO`                      |                       |
+|`KC.INT2`               |`KC.KANA`                    |                       |
+|`KC.INT3`               |`KC.JYEN`                    |                       |
+|`KC.INT4`               |`KC.HENK`                    |                       |
+|`KC.INT5`               |`KC.MHEN`                    |                       |
+|`KC.INT6`               |                             |                       |
+|`KC.INT7`               |                             |                       |
+|`KC.INT8`               |                             |                       |
+|`KC.INT9`               |                             |                       |
+|`KC.LANG1`              |`HAEN`                       |                       |
+|`KC.LANG2`              |`HAEJ`                       |                       |
+|`KC.LANG3`              |                             |                       |
+|`KC.LANG4`              |                             |                       |
+|`KC.LANG5`              |                             |                       |
+|`KC.LANG6`              |                             |                       |
+|`KC.LANG7`              |                             |                       |
+|`KC.LANG8`              |                             |                       |
+|`KC.LANG9`              |                             |                       |
 
 ## [Internal Keys]