The container GUI for a storage minecart displays with the title "container.minecart". The game doesn't correctly translate it, probably because the language files have not been updated to match a change in the name of the container in code.
This applies to all languages (tested 3 at random and EN_US, so probably).
To replicate:
Create a new world in creative mode
Place a rail and a storage minecart on top of it
Right click on the storage minecart and read the title of the GUI
Here is a screenshot: http://puu.sh/nhIuT/a6fa08e20c.jpg
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Thank you for your report.
However, your ticket has been resolved as a duplicate.
This issue has been linked to the original bugreport: MC-95922. You can find or add further information on that report.
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