While Yuhan Blu-ray DVD Creator supports the addition of external subtitles, it does not allow the direct inclusion of external audio tracks. However, you can use a free tool like MKVToolNix(https://mkvtoolnix.download/) to merge the video file with the external audio track into a single MKV file. Once merged, the MKV file can be imported into Yuhan Blu-ray DVD Creator for further processing.

MKVToolNix is compatible with Windows, Mac, and Linux, making it a versatile solution for preparing your video files with external audio tracks before Blu-ray authoring.