花キューピットってこーゆーのだっけ？
It was translated as:"Is this what a flower cupid does?"
I don't understand こーゆーの.
って has the function of "regarding"(i think)
だっけ means like "what was it again?"

質問を翻訳

こーゆーの = こういうの = こういう事。
Notice that it's written as it sounds when it's spoken.

って is like は but used in conversation. It's used to refer to something previously mentioned. Ex:
A「ななちゃん、可愛いね～」
B「ななちゃんって誰？」

だ is the not formal form of です.

っけ？is used when you are trying to remember something you are suposed to know and you look for confirmation. Ex:
A「君の名前は何ですか？」→ What's your name?
A「君の名前は何だっけ？」→ What was your name? (You probably told me but I can't remember)

Sumarazing:
花キューピットって
Cupido flowers (?) *I don't know wth is this.
こーゆーのだっけ?
Was it something like this? *I'm gessing this person is showing something to confirm it.