Bilingualism does not cause delays in language development.

First, the speech therapist takes both languages into account when assessing a child's language capability.
For example, the assessment measure of "50 expressive words at age 2" should include both Chinese and Japanese vocabulary that is used on a regular basis.
Of course, if we look at just one language, they are lagging behind their peers.
However, as they grow up and their language skills gradually improve, those who speak two languages can catch up with those of the same age who speak a single language.
In contrast, children with language delays have delays whether they are monolingual or bilingual.
Therefore, bilingualism is not the cause of the delay.
Various perspectives, such as the child's understanding of language and social skills, need to be taken into account when making decisions.
Parents can discuss their child's condition with the speech therapist to get a more detailed analysis and suggestions.
In everyday life, parents should try to do the following.

1. Tell the names of things to the children more often and praise them when they can speak.
2. Interacting more orally and orally, and answering questions (full, hungry, playing, eating, drinking, etc.)
3. Understand that the voice of a child who is just starting to speak may not be very clear and praise him/her immediately when he/she imitates and repeats the language (the language spoken by children from 1 to 2 years old should be understood by a familiar adult. (The language spoken by children from 1 and 2 years old should be understood by a familiar adult; it is not until they are 3 or 4 years old that they start to speak clearly like an adult.

Observe your child's performance under different circumstances and record which circumstance he speaks more fluently.

If the child is bilingual/trilingual, also observe if there is a difference in fluency when using other languages. During the process of language development, many children have difficulty in speaking fluently.
There are a variety of possible reasons, such as environmental factors, psychological factors, too much content to express, but not enough development of the ability to express the language.
It is recommended that parents consult with the speech therapist about their child's situation to get more specific feedback.
Make an appointment for assessment and treatment with the speech therapist, if needed.

It is recommended that you first discuss your child's condition with the speech therapist.

It is advisable to determine if an assessment is needed, if the language disorder is present, and to find out what might be causing the problem before implementing pronunciation training.

It may be caused by damage to the language area of the brain, leading to communication difficulties due to "aphasia".

Stroke patients may have difficulty with naming, circumlocution, and understanding language.
It is advisable to discuss the patient's condition with the speech therapist before conducting an assessment and building an individualized treatment plan. In addition, the caregiver will need to do the following in daily life.
1.Give him enough time to organize what he wants to express and talk with him in a relaxed manner.
2. Do not treat them like children because of their impaired language skills, but treat them like adults.
3. Support with various communication methods such as gestures, facial expressions, symbols, images, and text.