on my Laptop=Dell latitude E6510, RAM=8Gb, GPU=GT218 NVS 3100M, CPU=i7 Q 720 @ 1.60GHz running opensuse leap 42.2, plasma 5.10.3, KDE frameworks 5.36.0, KDE applications 17.04.2, Kernel 4.4.74-18.20-default, nvidia drivers, libreoffice 5.3.3.2
I noted after last update but may not be related, there are mixed languages, greek, english, italian. for example:
http://paste.opensuse.org/view/download/99232222
during desktop change
http://paste.opensuse.org/view/download/10069170
in the menu
http://paste.opensuse.org/view/download/32167579
in spectacle
how can I have only one language??? 
I_A
#2
I do believe this might be the old plasma 5.8 language bug that has been reported before
https://forums.opensuse.org/showthread.php/511353-After-leap-upgrade-my-system-has-a-mixed-language
https://forums.opensuse.org/showthread.php/520802-Discussion-thread-for-42-2-Release-Candidate-2-(RC2)?p=2799560#post2799560
if you want only English menu’s English needs to be the only language installed/selected in kde’s settings->Language->Preferred Languages
It might be something new but I haven’t noticed any new changes with the last updates (then again I’m still on plasma 5.8 I was hoping this was fixed in 5.10)
manythanks, eliminated all the other languages an seems to be solved
…me too:)