RFE: per-category model choice for Disorder plugin

The Disorder plugin provides for a choice of models, “unbiased”, “multilingual”, and “original”. (See link for details.)

We have a primarily-English-language forum, and so “unbiased” is probably what we want. However, we also have a category specifically for non-English posts. It would be nice to be able to set posts from (only) that category to go to the multilingual classifier.

Alternately: something to first classify by language, and then choose the right model for each post.

(That would be separately helpful on its own — I’d love to automatically tag non-english posts with the corresponding language tag!)