-global lang cookie, + display (remember in each variant what is shown...)
-translations (how ? switch on index page only, then find ideas...)
-for each variant, adapt FEN (Crazyhouse, Grand, Loser, ...)
-Improve style for various screen sizes
+Finish https://www.chessvariants.com/mvopponent.dir/dynamo.html
+https://echekk.fr/spip.php?page=article&id_article=599
+And Chakart :)