Since version 4.0 there is support for translation files.

If you want to create a translation, have a look at the en.ts file.

It shows how a translation object is structured.

For a french translation, e.g., create a file called fr.ts and copy the content of the upper english file as template and start your translation.

I you have finished, you can post your file as attachment here (or do a pull request) and I will release it with a new release of the extension.