I think any decision to split wikis should not be made without consensus within the affected communities. From a technical standpoint, it would be much easier to decide in favour of a split, but I'm worried that the social ramifications of such a decision would be overlooked in a discussion among developers. It might be a good idea to present the challenges of continuing to maintain Language Converter to the communities, but if, for example, it turns out that having a single Chinese language is better for our free knowledge goals, then it might still be worth investing the time needed to overcome the technical hurdles.