WHAT'S MORE

Albanian

dhe për më tepër (and what's more). (various references)

Bulgarian 

какво още. (various references)

Chinese 

再說 (besides, let's talk about it later). (various references)

Dutch

voor de rest (as for the rest, besides, for the rest, moreover), verder (additional, farther, further, furthermore, moreover, remaining), trouwens (besides, moreover), overigens (besides, moreover). (various references)

Esperanto

cetere (besides, for the rest, moreover). (various references)

French

et puis, d'ailleurs (while). (various references)

Frisian

fierders (as for the rest, besides, for the rest, moreover). (various references)

German

zudem (in addition, moreover), außerdem (besides, also, moreover, in addition), übrigens (by the way). (various references)

Hungarian

mi több (what is more). (various references)

Italian

inoltre (besides, furthermore, moreover, for the rest), d'altronde (besides, for the rest, moreover). (various references)

Pig Latin

at'swhay oremay.(various references)

Polish

zresztą (as for the rest, besides, for the rest, moreover). (various references)

Romanian

şi pe deasupra (and what's more). (various references)

Russian 

причем (and besides). (various references)

Serbo-Croatian

povrh toga (besides, moreover, therewithal). (various references)