Often as teachers we find it difficult to cater for all of our students' needs, but we should not forget that the needs may also be strengths. Here is a great visual that demonstrates the benefits of bilingualism, even if catering for English as Additional Language learners may sometimes feel an added burden.
Having a bilingual child does not necessarily mean that the child’s relationship with languages is an easy one. It is possible that your bilingual child simultaneously loves and loathes languages.
Source: N Brown
Bringing up a child bilingually is a conscious decision, but there are issues and challenges that bilingual families encounter that are not mentioned in any of those handbooks or parent guides. Knowing about these might have had led to fewer disappointments.