Not a word, but there's a specific phrase uttered when you casually pass by someone working, stop for a chat, and then genuinely wish them well with their work as you leave.

This phrase does not exist in English:

• "Break a leg" is close, but more reserved for some grand performance

Nor does it exist in German:

• "Viel Spass/Glück" (Have fun, Good Luck) is also close, but has an element of sarcasm and/or success through chance.
• (Edit) "Frohes Schaffen" (Happy 'getting it done') is pretty spot on.

In Turkish, you just say "Kolay Gelsin", meaning "May the work come easy so that you finish sooner".

Its such a useful unjudgemental phrase, easily uttered, that I've seen nowhere else. Maybe other languages have it too.