Fix "can not" messages

As requested in a comment in I4db9e50.

There are a lot more (about 70) in Exceptions but I really don't
want to touch them all.

Change-Id: I185ecebe439b9a9779b09a3bca41b484073d3083
Run test on travis in Russian and Arabic also

This helps identifying problems coming from non-Latin
scripts and rtl languages.

Change-Id: I203ea8f88d2dc4fa9fba95b5db1cea14d0b3614c
Merge "Fix "can not" messages"
Merge "Run test on travis in Russian and Arabic also"