[TYPO3-english] TYPO3 log: "[lang]: User roland has cleared the language cache"

[Roland]

hi everybody,

what does this log message exactly mean?

--- quote ---
[lang]: User roland has cleared the language cache
--- /quote ---

this message is logged multiple times for every backend user without 
doing anything like manually clearing the cache via the flash button 
options.

any clues?

kind regards.

roland