I exported a modified English (US) language with 2 phrases and imported into a local clean installation of Xenforo. If I delete one of them or choose to overwrite the default during import (BTW when I choose overwrite, I still end up with two languages) , I get redirection errors when I click certain pages.One of them is trying to click "Phrases" from the sidebar. Another is if I click a language directly on the Appearance page. I can access the "Phrases" page if I click Languages on the sidebar, then click Phrases though. I also notice that once I import the language and delete one of them, I can no longer select a default language, which causes problems throughout AdminCP prompting me to select a language.