Diana languages

“I don’t know,” he said in a heavy accent.  Russian maybe.  Definitely Eastern European.  “Lots of bad stuff happening.  Must be careful.”
“Come on,” Alia said, attempting some measure of the easy charm her father had possessed in such abundance.  “Do we look like trouble?”
The guy looked up, up, up at Diana.
“Nie ne sme zaplaha,” she said, looking solemn.
Alia stared.  Diana spoke Russian?
…
“Geez,” Alia said as they headed up the stairs.  “What did you say to him?”
“I simply told him we weren’t threats.”
Alia rolled her eyes.  “Not suspicious at all.  How did you learn to speak Russian?”
“It was Bulgarian, and… I’m not entirely sure.”
“How many languages do you speak?”
Diana paused as if calculating.  “I think all of them.”