Hello Tomasz Kubik,
Thank you for writing.
The dialog windows in RadScheduler are not affected by the applied culture. In case you would like to change them, you should create a custom class that derives from RadSchedulerLocalizationProvider and override the GetLocalizedString() method. Here is a documentation article
that contains code sample.
I assume that by scheduler modes (Day, Week, ...)
you mean the text of RadSchedulerNavigator. If this is so, please refer to this help article
. In case this is not helpful, please provide more details about the issue.
I hope you find my answer useful. Let me know if I can assist you further.
the Telerik team
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