What's the best way to manage large collections with multilingual metadata?

Metadata & Artwork
1

Thousands of movies via NFS mount:

  1. Language option in favorite settings? Not supported.
  2. Language option in folder settings? Not supported.
  3. Language tags in filenames? Not supported.
  4. Local NFOs? TinyMM does not support above 1, 2 & 3 too.

Any suggestions?