The official language of Argentina is Spanish. It is a Romance language that is widely spoken throughout the country and is the primary means of communication among its citizens. Spanish is also the language used in official government and business dealings, as well as in the education system.

The Spanish spoken in Argentina is often referred to as 'Argentinian Spanish' and it has its own unique characteristics and dialects. This variation of Spanish is known for its soft and melodic intonation, as well as its use of the 'voseo' form. The 'voseo' form is the use of the pronoun 'vos' instead of 'tú' which is used in other Spanish-speaking countries, it's also common to hear the use of 'che' as an informal way to address someone.

Argentinian Spanish also incorporates many words and phrases from other languages, such as Italian and indigenous languages. This is a result of the country's diverse cultural heritage, with a significant influence from European immigration, particularly from Italy, Spain, and Germany.

In addition to Spanish, there are also many other languages spoken in Argentina. These include Italian, German, English, and various indigenous languages. However, these languages are not as widely spoken as Spanish and are mainly used within specific communities or regions.

Despite the presence of these other languages, Spanish remains the dominant language in Argentina and is the main language used in all aspects of daily life. It is also the language that unites all Argentinians, regardless of their cultural background.

In conclusion, the official language of Argentina is Spanish, which is widely spoken and understood throughout the country. The Spanish spoken in Argentina has its own unique characteristics and dialects and is influenced by the country's diverse cultural heritage. While other languages are also present in Argentina, Spanish remains the dominant language and is the main means of communication among its citizens.