Here are some simple guidelines to detect it depending on age:

• If at 2 years or 2 and a half years the speech of your child is almost non-existent or unintelligible.
• If at 3 years is not able to create simple sentences and only communicates through gestures or monosyllables.
• If at 5 he has a little elaborate language and has difficulty expressing his ideas.
• If from the age of 5 years there are errors such as lisping, not pronouncing mistakes …
• If you detect alterations in rhythm with repetitions of syllables, lack of fluency or abrupt interruptions.