As a social being, man has been referred to other people and together with them creates relationships on which the community is founded. To be able to communicate with other members of the community, he must be able to transmit and receive messages. This is accomplished by language. We differentiate between standard and colloquial language. The standard language is regulated, standardized and codified. It is accepted and recognized as a language for general communication. It is an over-regional form of the language of all layers of society, this is its basic property and the main motive of creation. This is different from dialects which are regional idioms. This property distinguishes it from sociolects which are the languages of the individual layers of society. Unlike standard language which is used in official and public communications, colloquial language is used to communicate directly in private everyday life situations: at home, on the street, at the market, in conversation with family members, with relatives, friends and acquaintances. Croatian society is linguistically complex. Before reaching the current state of language Croats have begun to develop linguistic features according to which there are three distinguishable dialects: Chakavian, Stoqavian and Kajkavian. Croatian language is the majority language in the Republic of Croatia there are also minority languages: Italian, German, Hungarian, Czech, Serbian, Albanian, Romani... Because of the lack of workforce and the search for a more stable life, today there is an increasing number of migrants. Modern migration processes are in turn creating an even more complex language situation. It is present and especially pronounced in educational institutions, kindergartens and primary schools. Teachers are faced with the task of establishing good communication with children and their parents in the linguistic and cultural sense, and this task requires bridging language barriers, those on the multilingual level of speakers in Croatian society and those on the level of multidialectism of Croatian language speakers. In this context, this paper presents the linguistic diversity of Croatian society with a focus on linguistic awareness of these phenomena, needed throughout the society, and especially among the teachers and in the educational system in which children are being raised and educated - speakers of different languages and different Croatian dialects.