I am still using your addon but not many people on my server are using it unfortunately. Please find here my current version to make frFR working (strange problem with character encoding it seems).
I put a --OK at the end of each quest I personnaly checked. If one is not recognised, please, go to the DailyTracker.lua, change false to true for the variable DebugEnabled at the top of the file and reloadui (/reloadui). Then do again the check and PASTE AND COPY to the french localisation file. Be sure to use an editor supporting UTF8 encoding to avoid breaking all the file.