What I see in taginfo is that amenity=culture_center has only 87 occurrences in the world, almost exclusively in North-America, whereas the tag I provided to you has 2,208 occurrences.

The convention is not my personal choice, it’s part of the general OSM guidelines. The names of tags and their values should follow British English spelling conventions (for example, "colour" instead of "color," "favour" instead of "favor").  This ensures consistency throughout the map's data and avoids duplication that might arise if different contributors use American or other English variations.