The best way to study languages is to study them one at a time. The introduction of the OPOL (one person, one language) tactic is gaining popularity worldwide. It works well to begin teaching them to growing children, and each parent’s role is in teaching one child one language for the time being. If the appropriate person is the one to teach a child, like a parent to his/her child, it will be easy for the child to associate the language with the parent and adapt it in his/her daily life. Nowadays many people are getting into inter-marriages; that is two people with two different nationalities marrying each other, like an American man to an Asian woman. In case when each parent wants the child to be able to speak his/her language, then it is best to adopt the OPOL method. If the father is American he is going to speak English at all times to his child. If the mother is Asian she will be using her language when communicating to their child. That is how the one person one language works.

This strategy is flexible and adaptable for children being raised by bilingual parents, where each of them should be consistent with the individual language being used when communicating to their children. In return, it is up to the child/children which language he/she will prefer to use when communicating. The important thing is for the child/children to assimilate the languages being taught to them by their parents. This should be easy, but there is one common disadvantage in applying this method. There is the tendency of the child/children to speak in mix languages occasionally, so that they are likely to invent their own words. The minority language, which is the language native to one parent but not to the community, is usually the one that the child finds difficult to learn and apply. On the other hand, the majority language is what one parent and the community speaks, so that it becomes dominant therefore much easier for the child to apply because technically he/she is living with it.

Ultimately, children can actually become active bilinguals if the parents themselves impose firm learning and speaking of the two languages used by them. At the start children may more regularly speak what they prefer, but later on they can certainly able to speak both languages whenever they have to.