Since 17.04, the translations (messages, translated documentation, localized data) are included in the tarballs but *only* for Frameworks 5 applications.
Translations for kdelibs4 applications and modules (like kdelibs4 itself and kde-runtime) are still shipped inside kde-l10n*.
Tarballs that join the KDE Applications release
Tarballs that were based on kdelibs4 and are now KF5 based
* kmag * kmousetool * kgoldrunner * kigo * konquest * kreversi * ksnakeduel * kspaceduel * ksudoku * kubrick * lskat
Tarballs that we do not ship anymore
Tarballs that have changed contents
- kdeedu-data and ktuberling may show Perl as requirements due to few l10n-related macro for sr data files.
- dolphin, kgeography and step, due to few additional files and a regression in KI18n, fails for KI18n 5.34 and 5.35. See https://mail.kde.org/pipermail/release-team/2017-July/010424.html for more details.