All command feedback messages are now translatable.
There appears to be a missing translation string when the server has an error executing a command:
The string does not appear in the translation file (for en_us at least).
1. Open a server console and type a command with an incorrect bound.
2. Observe the output.
Example: /weather clear 9999999999999
When providing the translation string "command.context.failed": "1: %s, 2: %s, 3: %s, 4: %s, 5: %s" to see what arguments are provided, there are no arguments provided.
It appears that the entire command failed string is buggy or something. See the second screenshot for the updated output.