Bilingualism in early childhood can have many benefits, including:
Cognitive development
Learning a second language at a young age can improve cognitive development, memory, creativity, and problem-solving skills.
Academic performance
Children who learn in two or more languages may have higher academic achievement and perform better in subjects like math and music.
Better concentration
Bilingual children need to choose which language to use in a given situation, which can help them focus and make decisions.
Increased cultural awareness
Bilingual children can communicate with more people and understand different cultures.
Career opportunities
Bilingualism can open up more career opportunities, as companies are becoming more global and collaboration is becoming more important.
Increased self-esteem
Bilingual children can feel secure in their identity and have more self-confidence.
Reduced risk of dementia
Studies have found that bilingualism can help prevent dementia in old age.
https://www.ed.gov/sites/ed/files/documents/early-learning/talk-read-sing/bilingual-en.pdf
https://tcf.org/content/report/why-we-need-to-cultivate-americas-multilingual-multicultural-assets/