Sometimes, children use different words to designate animals they come across.
For example, when toddlers see a dog:
(English) dog ----------------------------- doggy
(French) chien ---------------------------- toutou (tootoo)
(Persian) سگ (pronounced sag) -------- هاپو (hoppoo)*
*I've named one of my dogs "Hoppoo"...
Meet Hoppoo: