When updating a set of nodes using VBO "Modify entity values" in order to change content language from "Language Neutral" to "English."

The aliases associated with those nodes remain language neutral. This means that visiting the node edit page will result in no alias appearing. However, the alias will live on as language neutral. Even if/when the node is updated to have a language-based alias, the neutral one will remain.

Can't say that it's a problem to keep the language neutral alias before the node is actually translated, but this is not the standard behavior. Normally the alias is updated to reflect the node's language. This results in the translated display showing just a node/#### URL, but at least there's no dangling alias that will likely be cruft.