Generate a Word document using different languages - apache-poi

Question

I want to create a Word document that uses different languages. In particular, I have a two-language original text where the language changes between English and German for each paragraph. This is what I tried:
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import org.apache.poi.xwpf.usermodel.XWPFDocument;
import org.apache.poi.xwpf.usermodel.XWPFParagraph;
import org.apache.poi.xwpf.usermodel.XWPFRun;
import org.apache.poi.xwpf.usermodel.XWPFStyles;
public class DocxCreator {
public static void createDocument(File docxOutput) throws IOException {
XWPFDocument doc = new XWPFDocument();
XWPFStyles docStyles = doc.createStyles();
docStyles.setSpellingLanguage("de-DE");
{
XWPFParagraph para = doc.createParagraph();
XWPFRun run = para.createRun();
run.setLanguage("de-DE"); // XXX: this method does not exist
para.setText("Deutsch");
}
{
XWPFParagraph para = doc.createParagraph();
XWPFRun paraRun = para.createRun();
para.setStyle("en-US");
paraRun.setText("English");
}
/*- XXX: How do I add the style “en-US” to the document and set its language to en-US”? */
/* XXX: How do I enable global grammar and spell checking? */
try (FileOutputStream fos = new FileOutputStream(docxOutput)) {
doc.write(fos);
}
}
public static void main(String[] args) throws IOException {
createDocument(new File("multilang.docx"));
}
}

Answer 1

I do not think this is currently supported by POI.
Generally, the language of the text is specified on the XWPFRun (XWPF) / CharacterRun (HWPF) level.
For HWPF (old binary *.doc format) there exists at least a method CharacterRun.getLanguageCode() - but no respective setter.
For XWPF (new *.docx format) I do not see such a thing at all.
The language codes are the same for *.doc and *.docx. A list is available here.