Media diagnostics · Primary-source explanation; examples are illustrative. Instructions are based on publisher guidance; a UK IPTV account was not tested on this platform.
Decide whether the label is wrong
A player can display an incorrect language name for a local audio track whose spoken content is otherwise correct. The mkvpropedit manual documents editing existing Matroska properties, including track language, name and default flags, without a complete remux. That addresses a metadata error. It does not produce a dubbed soundtrack or turn an unknown language recording into a different spoken language merely because the menu label changed.
Identify the exact track before editing
For an original example, a permitted file has two audio tracks with similar names. Listen to a short identifiable passage in each and record the track identity before deciding which label is inaccurate. Work on a separate preserved copy because the documented tool modifies the existing file. A track position, a track identifier and a familiar visible label are not automatically interchangeable selectors; use the installed tool documentation for the selector actually supplied.
Check the viewer result
After a justified metadata correction, reopen the copy and confirm both the displayed label and the actual sound on the intended track. Keep the unmodified original and a record of the changed property. If the wanted language audio is absent, a metadata editor is the wrong remedy. This article concerns a local file maintenance decision and does not establish which languages a remote service supplies, whether its player follows the same selection rules, or whether any programme has been newly made available.