You can sell your film with different languages either with subtitles or dubbed audio. You'll need to upload a separate video file for each version, whether it's subtitled or dubbed. If you are offering different subtitle versions, you need to "burn-in" the subtitles on the video before uploading.
If you are ripping from a DVD that you already authored with subtitle tracks, you can simultaneously rip and burn-in subtitles from the DVD if you use the Handbrake software. Watch our DVD ripping tutorial for details on how this works. The instructions about subtitles are at the end of the video.
Otherwise, you can burn-in your subtitles using your editing software.
When you upload different language versions, you should specify in the product name and product description exactly which version the customer is purchasing, since they need to choose the version before payment.