I decided to make a complete move, cleard the Windows dual boot and installed the complete package.

I am multi lingual, added Hebrew to my prime language English, all OK but - now Hebrew has taken over, and despite English being marked as priority language, all program headings and Dolphin, show Hebrew text.

How can I get it to use English only.

I need the Hebrew just to write some documents, but all the UI should be English only.

Thank you
Alex

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Language[s] configured here are used for interface translations, not for text entry. If you don't intend using UI in Hebrew remove if from the list of preferred languages and add a Hebrew keyboard in hardware-input devices-keyboard-layouts.

Thanks lvm,

This fixed the problem, but it brings up other questions:

1) I "Arrived" into the Linux world just 2 months ago, after 30+ years in Windows, I am happy about my move
2) My first attempt was with Ubuntu 20.04 LTS, this problem didn't manifest itself
3) It only showed up when I cleard out of dual boot and installed KDE on the entire disk, how come?
4) It only manifested itself in Pinta (image editing) where all the menu options labels show in Hebrew and in Dolphin, where one column only display in Hebrew.
5) In my setup, English is my primary language, why would any program start using Hebrew?
6) IMO - there is a bug somewhere, can I report it? Where?

Many thanks again
Alex

Hebrew showed up because you told it to. Languages don't just appear for no reason. It's a settings issue, but I don't use KDE, so I don't know where to start looking. If you just want to type Hebrew in documents, configure that in LibreOFfice, and remove all mention of Hebrew in the system. By default, LibreOffice installs every language it has, and they can be used in documents. It doesn't affect anything outside of LibreOffice. This works the same in Windows and in Linux.

What I said was:
1) In my initial trials I installed Ubuntu 20.04
2) I added Hebrew- as a 2nd language under Regional settings
3) I did NOT experience this problem

Then, I installed KDE and the problem shows up, with the same above setup

I now removed the 2nd language / Hebrew and the problem is gone.
It must be a bug in KDE that caused the problem

Cheers
Alex

In native KDE programs UI language can be switched on the fly via help-switch application language, you could've done that accidentally (and by the way, KDE has excellent built-in help - just press the Help button on the appropriate Settings page). If you are sure it is a bug you can discuss in KDE community forums at https://forum.kde.org/ or file a bug at https://bugs.kde.org/

Thanks for the feedback,

Nothing was done accidentaly, I am sure
But, thaks for the link

Yes, I will report it

Cheers
Alex