This base has too much slang!!

Haruna will probably be overjoyed, but I find it a pain in the arse!! The Haruna being referred to is the Haruna from Arpeggio of Blue Steel

That's not true; differing from other places, we try to use proper terminologies as much as we can.

...For example?

Like "Chu-Chu-❤"

Or "Night battle (deep meaning)"

And recently "****" and all, incomprehensible!

...Kongou-san, where did those words originate from?

From Kongou!