How to remove tag spam and set language in several MKV files at once

[OttoKerner]

For users of a single language, here is a solution which first looks for ‘undetermined’ language tags and replaces them with a fixed language setting.

For many users this might be already sufficient

Set Audio Language tag MP4/MKV

Yep. Copy the below and save as WhatEverYouLike.cmd… @ECHO OFF ECHO. ECHO Set all Undetermined(und) audio language to English(eng) in current folder. ECHO. ECHO. FOR %%A IN (*.mkv) DO ( FOR /F %%I IN ('mkvmerge.exe --identify "%%A" ^| FIND /C "Track ID"') DO ( IF %%I GTR 0 ( FOR /L %%T IN (0,1,%%I) DO ( mkvmerge.exe -I "%%~dpnxA" | FINDSTR /C:"Track ID %%T: audio" | FINDSTR /C:"language:und">NUL IF NOT ERRORLEVEL 1 ECHO Undetermined audio language found. & ECHO "%%…