Answer: Older people who migrate have a harder time with the language barrier.
Explanation:
Immigrants differ in how much of an investment in resources (time, money, effort) they need to make in order to reach a certain level of language proficiency. The most decisive factor is the age of arrival in the host country. The ability to learn new languages declines strongly with age.
Source: https://wol.iza.org/uploads/articles/177/pdfs/what-drives-language-proficiency-of-immigrants.pdf
