Notice same tag but different spelling

Hiya

I was surfing on Dannbooru earlier and happen to bump into a few posts with same tags but just different spellings. I wasn't sure was this an error or supposed to be, but just to double check on the forums incase.

sangoku_musou
sengoku_musou

arc_rise_fantasia
arcrise_fantasia

I bump into it across these few posts

post #569875
post #512144
post #512150

use the post #XXXXX format when posting links to images.

As for the tags, I actually think Sangoku and Sengoku should refer to different things, and the other just needs to be aliased one way or the other.

Sangoku and Sengoku do refer to different things.

"Sangoku" (三国) means "three nations", and almost always refers to the Chinese Three Kingdoms era. This is notable as the setting for Romance of the Three Kingdoms, and from that source, we have such things as Ikkitousen, Sangoku Musou/Dynasty Warriors, Koihime Musou, and many more.

"Sengoku" (戦国) means "nation at war", and is typically used to refer to the Japanese Warring States era (戦国時代). This is the setting for many historically-based series, including Inuyasha, Sengoku Basara, Sengoku Musou/Samurai Warriors, and so on.

sen/san seems to be covered. As for the other, arc_rise seems to be right

Aliasing.