As of Programmer's Notepad 2.1 (now in testing), you can translate PN into your own language. The translations use the standard PO format files, which can be edited by a wide variety of tools. We recommend using Poedit.
When saving your translation, it should be saved with a name conforming to this format:
The language will be made available with the next PN release, but will need updating for each new release. Testing releases will not be delayed for language updates, but Stable releases may be.
This allows you to test your translation with Programmer's Notepad.
tools\ResText\ResText apply bin\pnlang.dll bin\pnlang_<language details>_<version>.dll translations\<your translation>.po
The template file is updated for each translation tools release, but if you wish to do this yourself you'll need to run this command from the translation tools directory:
tools\ResText\ResText extract bin\pnlang.dll translations\pnlang_2057_en-GB.pot
For this to work you'll need the msgmerge tool, I use the one bundled with the PoEdit tool. Here are the steps:
msgmerge -o temp.po translations\<your translation>.po translations\pnlang_2057_en-GB.pot