If you have to second guess yourself on your language abilities, then maybe you shouldn't state that you know the language.
This would be similar to writing on resume that I'm conversational in Arabic after watching Team America. Or saying that I'm conversational in Japanese after watching a shitload of Japanese porn.
Just because you fingered yourself to your favorite male idol in some obscure drama and understood three common words, that does not make you fluent in a language.
If you have any submissions for STFU, send them to hanyeseul_fag@yahoo.com or to @antikpopfangirl on Twitter.