diff --git a/matroska/KaxSemantic.h b/matroska/KaxSemantic.h
index af514d5..a87eda9 100644
--- a/matroska/KaxSemantic.h
+++ b/matroska/KaxSemantic.h
@@ -906,22 +906,6 @@ typedef enum {
   MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP      = 3, // Octets in `ContentCompSettings` ((#contentcompsettings-element)) have been stripped from each frame.
 } MatroskaTrackEncodingCompAlgo;
 
-/**
- *This `ChapterTranslate` applies to this chapter codec of the given chapter edition(s); see (#chapprocesscodecid-element).
- */
-typedef enum {
-  MATROSKA_CHAPTERTRANSLATECODEC_MATROSKA_SCRIPT  = 0, // Chapter commands using the Matroska Script codec.
-  MATROSKA_CHAPTERTRANSLATECODEC_DVD_MENU         = 1, // Chapter commands using the DVD-like codec.
-} MatroskaChapterTranslateCodec;
-
-/**
- *This `TrackTranslate` applies to this chapter codec of the given chapter edition(s); see (#chapprocesscodecid-element).
- */
-typedef enum {
-  MATROSKA_TRACKTRANSLATECODEC_MATROSKA_SCRIPT  = 0, // Chapter commands using the Matroska Script codec.
-  MATROSKA_TRACKTRANSLATECODEC_DVD_MENU         = 1, // Chapter commands using the DVD-like codec.
-} MatroskaTrackTranslateCodec;
-
 /**
  *Specify whether the video frames in this track are interlaced.
  */