"A person who has lived in and is familiar with many different parts of the world." is called -

• "A person who has lived in and is familiar with many different parts of the world." is called - Cosmopolitan.

• Cosmopolitan (Noun, Adjective)
- English meaning: Containing people of different types or from different countries, and influenced by their culture.
- Bangla meaning: বিশ্বের সব বা বহু অঞ্চল থেকে আগত।

• Other options:
- Tourist: A person who is travelling or visiting a place for pleasure.
- Bangla meaning: পর্যটক।

- Malingerer: A person who pretends to be ill, especially in order to avoid work.
- Bangla meaning: কর্তব্য এড়াতে অসুস্থতার ভান করা।।

- Curator: A ​person whose job is to be in charge of the objects or works of art in a museum or an.
- Bangla meaning: জাদুঘর-পরিচালক।

Source: Merriam & Webster Dictionary, Oxford Dictionary, Accessible Dictionary, English-Bangla Dictionary.