I guess that the search field is implemented with Kirigami.SearchField. The placeholder is translated into Russian in messages/frameworks/libkirigami2plugin_qt.po.

Yaroslav (CC'd) was able to reproduce after a few runs of the KCM.

I'm not sure if two attempts running the KCM is always enough to reproduce, it might depend on the system or software configuration.

On 1 of my PC's I can reproduce this issue every time.
When I run `kcmshell5 kcm_kwin_effects` from console I see this warning (among others):

file:///usr/lib64/qt5/qml/org/kde/kirigami.2/SearchField.qml:47:9: QML Action: LayoutDirection attached property only works with Items and Windows

Maybe it gives some clues.

Forgot to mention my software versions, here it is:

Operating System: Fedora 30
KDE Plasma Version: 5.17.2
KDE Frameworks Version: 5.63.0
Qt Version: 5.12.5
Kernel Version: 5.2.17-200.fc30.x86_64
OS Type: 64-bit

I can reproduce it with French localization.

Operating System: Kubuntu 19.10
KDE Plasma Version: 5.17.2
KDE Frameworks Version: 5.62.0
Qt Version: 5.12.4

With warnings:

file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/SearchField.qml:47:9: QML Action: LayoutDirection attached property only works with Items and Windows
Constructing a KPluginInfo object from old style JSON. Please use kcoreaddons_desktop_to_json() for "/usr/lib/x86_64-linux-gnu/qt5/plugins/kwin/effects/configs/kcm_kwin4_genericscripted.so" instead of kservice_desktop_to_json() in your CMake code.
file:///usr/share/kpackage/kcms/kcm_kwin_effects/contents/ui/main.qml:96:19: QML SwipeListItem: Binding loop detected for property "implicitHeight"

I opened a PR to fix this : https://phabricator.kde.org/D25190

Moving to kirigami. If there is something we need to do in kwin to set the translation domain or whatever, please do move back.

The string "Search..." is correctly present in https://websvn.kde.org/*checkout*/trunk/l10n-kf5/fr/messages/kde-workspace/kcm_kwin_effects.po
This hints towards an issue in kirigami/Qt qml translation propagation/loading.

(In reply to Méven Car from comment #7)
> The string "Search..." is correctly present in
> https://websvn.kde.org/*checkout*/trunk/l10n-kf5/fr/messages/kde-workspace/
> kcm_kwin_effects.po
> This hints towards an issue in kirigami/Qt qml translation
> propagation/loading.

This line is from the old plasma, and it is commented out

#~ msgid "Search..."
#~ msgstr "ChercherтАж"

*** Bug 415753 has been marked as a duplicate of this bug. ***

Is this still happening?

.

Can't reproduce with plasma-5.24.5 & kf-5.93.0 on Fedora 35 and 36.
Can somebody confirm this bug can be reproduced?

Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
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no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
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Thank you for helping us make KDE software even better for everyone!

This bug has been in NEEDSINFO status with no change for at least
30 days. The bug is now closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!

Cannot reproduce with Plasma 5.24.4 on Fedora 35. Thank you!