jPDFNotes comes in 5 languages: English, French, German, Italian, Spanish. jPDFNotes being built on top of our viewer-only component jPDFViewer, the localization for jPDFNotes works the same as for jPDFViewer. See our entry in the jPDFViewer knowledge base. The only differences is that there are 2 files to localize: ViewerLabels.properties AND NotesLabels.properties. The label files can be found inside the jPDFNotes.jar file.