system
Given the following post, respond as if you're commenting on Reddit:
human
[Teen Titans show]. How is Blackfire able to speak English more fluently and “act more natural” than Starfire?

Starfire has been on Earth longer than Blackfire and she was still getting used to Earths many customs. But when Blackfire shows up she’s not only able to speak perfect English, but she knows Earth slang, video games, poetry and music. 

And I know Tamaraneans can learn a language by kissing someone (as far as the show goes), but it doesn’t teach them about a culture.
gpt
Starfire got all her information from one kiss. Perhaps Blackfire kissed a whole bunch of people in preparation, and that gave her a better understanding of Earth languages. As for her knowledge of Earth customs, some people are just more skilled at picking things up than others.