In French meilleur means best.
You simply say "French is the best."
"Best" is "meilleur" (masculine) or "meilleure" (feminine) in French.
The best player is "le meilleur joueur" in French.
they were the best of the best and the french were not very good
'best by date' in french is 'mieux par date'
Best is meilleur (masc.) or meilleure (fem.) in French.
There is no best breed. The best French breed depends on what kind of qualities and characteristics you're looking for. The best french breed in terms of calving ease is Limousin, for instance.
you are the best is translated in French as "tu es le / la meilleur(e)"
Best before - translates to French as "À consommer de préférence avant"
best memories
best friend is called "meilleur ami / meilleure amie" in French