Re: Saying "Thank you."

In Cenlatorre, "Thank you" is 'esshanna.' ([eSSAnn@])

Broken down, it comes from 'shanna', the past tense of "to exist," and
the prefix 'es-' which means "to do for a good purpose."  The /s/ in
es- assimilates to /S/.  Literally, then, it means "It existed for a
good purpose."

"You're welcome" is 'zesa shi,' ([zEsa Si]) which is just "It's nothing."

These expressions are pretty short.  Maybe I should come up with something
longer for more formal use. ;)