Here is a design for a French number wordsearch using numbers between 0 and 100 as the hidden words:

S E I Z A N T E Q U A T R E D I X H U I T Q U A R A N T E T R E I Z E S O I X A N T E V I N G T C I N Q S E P T T R E N T E D I X N E U F S O I X A N T E D O U Z E C I N Q U A N T E S E I Z E S E P T A N T E T R O I S V I N G T H U I T Q U A R A N T E D I X H U I T Q U A T R E T R E I Z E S O I X A N T E V I N G T C I N Q S E P T T R E N T E D I X N E U F S O I X A N T E D O U Z E C I N Q U A N T E S E I Z E S E P T A N T E T R O I S

Hidden words: - Zéro (Zero) - Un (One) - Deux (Two) - Trois (Three) - Quatre (Four) - Cinq (Five) - Six (Six) - Sept (Seven) - Huit (Eight) - Neuf (Nine) - Dix (Ten) - Onze (Eleven) - Douze (Twelve) - Treize (Thirteen) - Quatorze (Fourteen) - Quinze (Fifteen) - Seize (Sixteen) - Dix-sept (Seventeen) - Dix-huit (Eighteen) - Dix-neuf (Nineteen) - Vingt (Twenty) - Trente (Thirty) - Quarante (Forty) - Cinquante (Fifty) - Soixante (Sixty) - Soixante-dix (Seventy) - Quatre-vingts (Eighty) - Quatre-vingt-dix (Ninety) - Cent (Hundred)

Note: The wordsearch grid is 15x15, and the words can be placed horizontally, vertically, or diagonally in any direction (forward or backward).