Angryverse/Nana

Nana is a human that can't speak English.

Stella: Nana and the Magic English Words
Nana was transferred into an overseas school after her parents are reassigned to another country. Unfortunately, she can hardly speak any English and thus cannot make any friends. However, she later met Stella at her school's botanical garden and tells Nana to collect mysterious English words to save the school from Gale.