TheCubicWebBook #652861 how translate a string defined in another cube [resolved]

For example the folder cube defines a such string "%s filed_under Folder %". Because it is defined in the folder cube, this string doesn't appear in your .po file. How can we translate this string in our cube ?

prioritynormal
typeenhancement
done incw_course
load0.100
load left0.000
closed by<not specified>