A minor details, but I think it would make sense to have an option to separate our streaks between languages. In spirit this is similar to what was requested here: Feature Request: Time and progress tracker
A side effect of the current mechanism is that it clutters the words read statistic. The negative here being that I find it motivating to try and match the previous number of words I read, but this stat kind of loses its value now since it’s combined between all languages
This last point doesn’t affect me but is in the same vein of thought, perhaps the reader settings should have the option to be controlled on a per language basis.