/usr/lib/libkdevplatformlanguage.so.7 is in kdevplatform7-libs 1.6.0-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libkdevplatformlanguage.so.7.0.0
/usr/lib/libkdevplatformlanguage.so.7.0.0