Français

Oddly enough albern also translates to idiot in French....

'silly' found in these entries
In the English description:
absurd - antic - asinine - boob - buffoonery - clown about - corny - daffy - daft - daft as a brush - dippy - ditsy - ditzy - dizzy - fool around - footling - frivolous - giddy - goober - goof - goof around - goof off - goofball - goofy - hokum - horse about - horse around - inane - light-minded - look foolish - loony - make a funny face - messing around - monkey business - monkeying around - nutty - play the fool - sappy - slap happy
French:
évaporé - puéril - au temps pour moi - avoir l'air fin - bébête - bécasse - bécassine - benêt - bête - bêtise - connasse - crétin - dinde - dire des âneries - faire des bêtises - niais - nice - nigaud - oie - oison - pauvre fille - polissonner - rire comme un bossu - saucisse - stupide - Suis-je bête !

silly goose n slang ([sb] foolish or childish) dinde nf
cruche nf
silly person n ([sb] foolish or childish) idiot, idiote nmf
bete adj

English French
do silly things v expr informal (act childishly) faire des bêtises loc v
The boys are always doing silly things, like trying to put dolls' clothes on the cat.
Les garçons font toujours des bêtises, comme essayer de mettre des vêtements de poupée au chat.
do silly things v expr informal (act foolishly) faire des bêtises loc v
faire n'importe quoi loc v
She's done some silly things in her time, but lying to the police? How stupid can you get!
Elle a fait des bêtises étant jeune mais mentir à la police ! C'est vraiment bête !