The phrase [który jest który](javascript:void(0)) in English translates to "which is which." The word [który](javascript:void(0)) is a Polish relative/interrogative pronoun commonly translated as "which," "who," or "whom" depending on context, used to ask questions or specify an element from a known group.

The terms "Bolek i Lolek" refer to two famous characters from a Polish animated children's series created in the 1960s. They are two boys with distinct personalities and appearances: Bolek is taller and skinnier, usually dressed in a yellow shirt and red shorts, while Lolek is shorter and stockier, often seen in a white shirt and purple overalls. They became cultural icons in Poland and enjoyed worldwide recognition through their adventures. The question "Który to Bolek a który Lolek?" means "Which one is Bolek and which one is Lolek?"—a common question for fans learning to distinguish between the two.

So, the user's phrase combines the interrogative pronoun "który jest który" meaning "which is which" with the names Bolek and Lolek, the two characters of a beloved Polish cartoon. This phrase is typically used to ask for clarification in identifying who is who between Bolek and Lolek. In summary:

• [który jest który](javascript:void(0)) means "which is which."
• Bolek and Lolek are two classic animated characters.
• The phrase asks for distinguishing between the two characters.

This explanation covers the meaning and context the user likely sought in the phrase provided.