I’m pretty sure theres not, but I’ve seen WD add languages in the past so you should definatly look through the ideas in the Idea lab (if it’s there simply vote for it) and post it if it does not already exist. WD said that they look through these for customer feedback.
Snir got it right!
For now you can use VOBsub subtitles. Its a pain th the **bleep** to make VOBsubs for every movie you watch but that is the only solution for now.
To convert subtitle files encoded in a different format, open the file with Notepad and do a Save As with the
following parameters: File Type—All Files and Encoding—UTF-8.