These packages seem to have been dropped from the repos.
Most probably they were installed as dependencies of other packages that are not dependent on them anymore.
Since the package management system doesn’t discover them in the repos, it “assumes” that they are foreign packages installed from AUR (or elsewhere). It won’t find them in AUR either hence the message.
Check with pactree -r
pactree -r kalarmcal
and
pactree -r libkipi-debug
I assume that they won’t output anything. Then it is safe to remove them from your system.
Tips: LANG=C before any commands in terminal will result in an output in English.
EX:
LANG=C pacman -Qi kalarmcal