What are the software for translation on Mac?
If you are asking about professional translation tools (rather than machine transation sites), there is a useful survey that includes some for Mac at

http://en.wikipedia.org/wiki/Computer-assisted_translation

Also can ask on the list devoted to Mac pro translators

https://groups.yahoo.com/neo/groups/MacLingua/info

(Relying on machine translation inevitably involves substantial risks of potentially embarassing errors, I recommend that the results should always be edited by a pro or native speaker)