I suggest this information for what release day to put be in the Help or something, formatting. So it would be standard. An example for disparity would be the series Naruto - Viz, which has Japanese release dates on the first entries and English release dates on later entries.
If a comic was originally released for Japan or other Countries/Language then adopted to English, what publishing date should be put for that English publisher? The original release date, or the english release?
Is the same comic series allowed multiple entries if they were released by different publishers(different language too), since they would be considered different?