This is the 7259th most frequent Polish word.
jula
"Jula" is not a standard Polish word. It may be a proper name or colloquial variation.
Here, 'Jula' is a proper noun, used as a personal name, relating to the subject of the sentence.
Jula uczy się hiszpańskiego z wielkim entuzjazmem.
Jula is learning Spanish with great enthusiasm.
In this sentence, 'Jula' still refers to a person's name (a diminutive form of Juliana) and acts as the subject experiencing the action.
Na końcu podwórka bawiła się mała Jula.
At the end of the yard, little Jula was playing.
Here, 'Jula' is used as the object of the sentence, identifying the person someone intends to meet.