Firefox desktop · Research guidance. Instructions are based on publisher guidance; a UK IPTV account was not tested on this platform.
Two downloads serve different purposes
Firefox can download language resources for local webpage translation. A streaming app can separately download media where its publisher supports offline use. The first does not provide the second. A completed language-pack installation is not evidence that any programme has been stored for offline viewing.
Local translation has a defined scope
Mozilla describes supported text translation on the device after the necessary language files are present. This can help read an already available article without sending its text to an external translation service. It does not make the website’s account, images, programme catalogue or video segments available without their own requirements.
Prepare the language direction
Check both the source and target languages supported by the installed Firefox feature. A single language name in settings does not establish every translation direction. Complete the resource preparation while connected if offline text translation matters. Do not assume a missing supported combination can be created by repeatedly refreshing the programme page.
Test the two tasks separately
For translation, use a short written section and inspect the result. For offline media, use only the service’s documented download feature and conditions. Do not save private streaming URLs or browser cache fragments as a substitute for a supported download. The browser translation setting does not grant redistribution or programme rights.
Keep the support conclusion accurate
Say that a language pack was installed and whether the relevant written text translated. If the programme still needs a connection, that is another dependency. Separating them avoids a false expectation that an on-device language feature has turned a streaming website into an offline library.
Questions, answered
Does installing a translation model save video programmes?
No. It supplies language-processing resources.
Does on-device translation make every website component offline?
No. Other content and account features have their own connection requirements.