Which language change at which place ?
Please be more precise and give more information.

Is it possible that you are referring to the EPG data of those channels, i.e. information of the current programme of a certain channel?
If yes, this will not be changed if your change the language setting of your receiver.

Or to be more precise: in case you have imported Polish EPG date for example with Rytec and then switch to a satellite channel, which has English EPG data, then it will show you the EPG data provided by the satellite channel.

@ruggero, I can sort of reproduce the issue you have described, but only for IPTV channels, not for cable channels. For Cable channels, the Box here will remember the audio language. I.e. I use Arte HD on Cable, switch audio from German to French, zap to Das Erste Cable, zap back to Arte HD Cable -> still French - good.

If I do the same on Arte HD IPTV (from Magenta TV at the end of the Deutschland IPTV bouquet. The Arte at the start of the bouquet does not have two languages), the box will not remember the Audio language change. (I had reported this here on the forum years ago - no solution was provided).

You might want to have a look at the settings (I translate it from German, so possibly the real words are slightly different). I describe it for the Web interface, you proably will find the same in the OSD.

Settings -> automatic language selection -> prefer saved audio language.

Make sure, you have this checked.