I have a multilingual site (English and Spanish) where English is the primary language, and Spanish nodes are prefixed with '/es'. Path custom breadcrumbs work for Language Neutral nodes, English nodes, but not for Spanish ones.
1) Create an English node at /content/somenode
2) Create a path breadcrumb to content/somenode and set it's language to No language or English - this works fine
3) Create a Spanish node at /es/content/somenode
4) Create a path breadcrumb to content/somenode, and set its language to Spanish - the breadcrumb isn't applied
(I'm actually trying to use this with aliases to language specific views)
I suspect the problem is to do with the language prefix in the path.