As of Mp3tag v3.35-beta.2, these are the untranslated strings for the Vietnamese translation of Mp3tag.
SLangOk &OK
_C_CHECK Check
_C_MANAGECOVERS_COL_COVER Cover
_C_MANAGECOVERS_COL_METADATA Metadata
_C_OPT_FILES Files
_C_OPT_FILES_FRM_READ Read Files
_C_OPT_FILES_FRM_RENAME Rename Files from Tags
_C_OPT_FILES_FRM_WRITE Write Files
_C_OPT_FILES_ST_REPLACE_FOLDER_SEPARATOR Replace folder separator in tag values with:
_C_OPT_EXP_RD_TRACK Track
_C_OPT_MAPPING Mapping
_M_STR_MPEGBITRATE Bitrate
_M_STR_TOOLBAR_COMMAND_SPACER Spacer
_M_STR_TOOLTIP Tooltip: