[robert@phebehouse ~] $ LC_ALL=fr_FR
[robert@phebehouse ~] $ printf "%.2f\n" 2.345
bash: printf: 2.345: invalid number
0,00
[robert@phebehouse ~] $ LC_ALL="C" printf "%.2f\n" 2.345
bash: printf: 2.345: invalid number
0,00
[robert@phebehouse ~] $ LC_ALL="C" ;  printf "%.2f\n" 2.345
2.35