Literacy and Economic-What if a person isn’t fluent in the languages that are important, does it still give them an upper hand?

Relate to my research paper please write the counter argument and counter-argument for counter-argument.
Here are some example counter questions (you can make your own counter question):
1. What about the business drawbacks of being bilingual? Are there even any economic or business disadvantage to being bilingual?
2. What if a person isn’t fluent in the languages that are important, does it still give them an upper hand?