Title: Languages of Spain
Content:  León and Zamora. In terms of the number of speakers and dominance, the most prominent of the languages of Spain is Spanish (Castilian), spoken by about 99% of Spaniards as a first or second language. According to a 2019 Pew Research survey, the most commonly spoken languages at home other than Spanish were Catalan in 8% of households, Valencian 4%, Galician 3% and Basque in 1% of homes. Distribution of the regional co-official languages in Spain: Spanish is official throughout the country; the rest of these languages have legal and co-official status in their respective communities and (except Aranese) are widespread enough to have daily newspapers and significant book publishing 
Title: Official languages of Spain
Content:  Spanish (sometimes called Castilian) is the only official language of the entire country and is spoken habitually and as a native language among a vast majority of the Spanish population. Spain is, along with Colombia and after Mexico and the United States, ranked third in the world as the country with the most Spanish speakers. Spanish is the only official language in Asturias, Cantabria, La Rioja, Aragon, Castile and León, Madrid, Castilla-La Mancha, Extremadura, Andalusia, the Canary Islands and the region of Murcia, as well as Ceuta, Melilla, and half of Navarre. It is also co-official with other languages in Catalonia, Balearic Islands, Valencia, Galicia, Basque Country and the Basque zone of Navarre. In all of the bilingual autonomous communities, with the exception of 
Title: Spaniards
Content:   Languages spoken in Spain include Spanish (castellano or español) (74%), Catalan (català, called valencià, in the Valencian Community) (17%), Galician (galego) (7%), and Basque (euskara) (2%). Other languages with a lower level of official recognition are Asturian (asturianu), Aranese Gascon (aranés), Aragonese (aragonés), and Leonese, each with their own various dialects. Spanish is the official state language, although the other languages are co-official in a number of autonomous communities. Peninsular Spanish is typically classified in northern and southern dialects; among the southern ones Andalusian Spanish is particularly important. The Canary Islands have a distinct dialect of Spanish which is close to Caribbean Spanish. The Spanish language 
Title: List of countries where Spanish is an official language
Content:  Spanish is the official language (either by law or de facto) in 20 sovereign states and one dependent territory, totaling around 442 million people. It is additionally the main official language in Equatorial Guinea. In these countries and territories, Spanish is the main or mostly used language of communication of the vast majority of the population; official documents are written chiefly or solely in that language; and it is taught in schools and utilized as the primary medium of instruction as part of the official curriculum.
Title: Spanish language
Content:  Spanish is the official, or national language in 18 countries and one territory in the Americas, Spain, and Equatorial Guinea. With a population of over 410 million, Hispanophone America accounts for the vast majority of Spanish speakers, of which Mexico is the most populous Spanish-speaking country. In the European Union, Spanish is the mother tongue of 8% of the population, with an additional 7% speaking it as a second language. Additionally, Spanish is the second most spoken language in the United States and is by far the most popular foreign language among students. In 2015, it was estimated that over 50 million Americans spoke Spanish, about 41 million of whom were native speakers. With continued immigration and increased use of the language domestically in public spheres and media, the number of Spanish speakers in the United States is expected to continue growing over the forthcoming decades.
Title: Official languages of Spain
Content:  Spanish is actually the native language of the majority of the population, although this is due in large part to the internal migration processes that occurred in Spain from the middle of the 20th century. The predominance of Spanish started in the Middle Ages with the Reconquista, expanding throughout the Kingdom of Castile (in which the language was born) and later to other areas in the Iberian peninsula; it had cultural prestige and was also spoken in part of the Kingdom of Aragon and of the Kingdom of Navarre. It gained importance in becoming an auxiliary language, along with commercial and diplomatic communication, in the 16th and 17th centuries. In the following centuries Spanish continued its expansion at the expense of the languages 
Title: Spanish language
Content:  [[File:Knowledge of Spanish in European Union.svg|thumb|Percentage of people who self reportedly know enough Spanish to hold a conversation, in the EU, 2005 ]] In Europe, Spanish is an official language of Spain, the country after which it is named and from which it originated. It is also widely spoken in Gibraltar and Andorra. Spanish is also spoken by immigrant communities in other European countries, such as the United Kingdom, France, Italy, and Germany. Spanish is an official language of the European Union.
Title: Demographics of Spain
Content: Spanish 99% (88% mother tongue ) (official nationwide) ; Catalan 16% (9% mother tongue ) (co-official in Catalonia, Balearic Islands, and Valencia — see Valencian) ; Galician 7% (5% mother tongue ) (co-official in Galicia) ; Basque 1.6% (1% mother tongue ) (co-official in Basque Country and designated areas in Navarre). ; Aranese (a variant of Gascon Occitan) is co-official in Val d'Aran, a small valley in the Pyrenees. Asturian-Leonese (in the former Kingdom of León and Asturias) ; Aragonese (in the province of Huesca, Aragon) ; Arabic (in the autonomous city of Ceuta) ; Berber (in the autonomous city of Melilla)  Others with no official status:
Title: Languages of Spain
Content:  The languages of Spain (lenguas de España), or Spanish languages (lenguas españolas), are the languages spoken in Spain. Most languages spoken in Spain belong to the Romance language family, of which Spanish is the only language which has official status for the whole country. Various other languages have co-official or recognised status in specific territories, and a number of unofficial languages and dialects are spoken in certain localities.
Title: Spanish language
Content:  Most Spanish speakers are in Hispanic America; of all countries with a majority of Spanish speakers, only Spain and Equatorial Guinea are outside the Americas. Nationally, Spanish is the official language—either de facto or de jure—of Argentina, Bolivia (co-official with Quechua, Aymara, Guarani, and 34 other languages), Chile, Colombia, Costa Rica, Cuba, Dominican Republic, Ecuador, El Salvador, Guatemala, Honduras, Mexico (co-official with 63 indigenous languages), Nicaragua, Panama, Paraguay (co-official with Guaraní), Peru (co-official with Quechua, Aymara, and "the other indigenous languages" ), Puerto Rico (co-official with English), Uruguay, and Venezuela. Spanish has no official recognition in the former British colony of Belize; however, per the 2000 census, it is spoken by 43% of the population. Mainly, it is spoken by the descendants of Hispanics 

Question: where is spanish spoken most?
Answer: Spain.