Based on the reports, it doesn't seem to work "without significant degradation" as I hoped.
@Nikerabbit I think it'd be interesting to try this plugin, but given that it'll be hard to test such changes without breaking current usage I'd suggest keeping the FuzzyLikeThis method now and start to add some new logic in TTM that we could activate with a URL param.
I'll swat the revert today, and add this plugin to the list of plugins to install to production.
@Johan we reverted the change that caused the issue, I tested few french translations and it seemed to work again on long text, could you double-check on your side and close the task if the issue is resolved? Sorry for the inconvenience, next time I'll keep the current implementation in place so that we can experiment with new techniques without breaking production usage.