If the language of a highly individualistic society contains many words and phrases about personal success and individual achievement that someone from a more communal society has difficulty fully understanding, this is an example of.

Linguistic relativity hypothesis.

Explanation: The linguistic relativity hypothesis also called Sapir–Whorf hypothesis or Whorfianism states that the way an individual views or conceptualize the world (environment) around him or her is influenced by the language he or she speaks. It argues that people's perceptions are directly linked to the language they speak.

Linguistic relativity hypothesis best illustrates the difficulties one from a communal society will have understanding the language with many words about individual success and achievement due to the difference in the way each of them conceptualize the world around them relative to their language.

glass wants to live in a world of super heroes and villains. he have lived all his life trying to be responsible for the creating the origin story of a super hero; he schemed and caused many incidents (many of them fatal) hoping that someday someone with superpowers would show up and save the day.

he knew himself very much. he saw himself as a villain of a real-life super hero story. he was aware of his strengths (more than smart enough for being manipulative and scheming) and weaknesses (having fragile bones and having to rely on his mind to succeed).