In PB32, select VIEW from the top command list.
Then look for Language, at the bottom of the list. It branches to the different languages at this point.
Note, the languages are SPECIFIC to the software version that you are developing with and FIRMWARE in the unit. I have had to do what you are talking about several times, from Spanish to English, Italian to English....there is no converter for Swedish.
I have resorted to exporting the descriptors to excel and then Babel-fished the translation to suit.
Good luck,