Kate is now translated also on Windows!
This release includes all the feature-enhancements the Linux version has received (frameworks announcements for 5.36.0)
– Actually working spell-checking.
– Possibility to switch interface language.
EDIT: Adding an extra fall-back UI language does not wok properly yet.

Grab it now at download.kde.org: Kate-setup-17.04.3-KF5.36-32bit or Kate-setup-17.04.3-KF5.36-64bit