SPARK-2093. There are more places which must be converted when loading from i18n. When contact is idle and user hovers over it, Spark shows a popup and shows Idle for message. This translation is garbled. Should be fixed somewhere in Idle plugin code.
Not sure which part of code is responsible for typing notifications, which is shown in the chat window when someone types or stops typing.
Same issue in the chat window when someone goes offline or online and it shows a message in green.