Thread:Support/MediaWiki:Linkfilter-ago/en

In this message parameter $1 is obviously a time. Does it refer to the messages MediaWiki:Linkfilter-time-days/en, MediaWiki:Linkfilter-time-hours/en, MediaWiki:Linkfilter-time-minutes/en, MediaWiki:Linkfilter-time-seconds/en? I ask this because - if it is so - the words in these 4 messages must be in grammatical case Instrumental in Upper Sorbian and Lower Sorbian.