In this case both sentence mean the same. There is no important difference as far as I see it.
they speak Spanish
Spanish and French are two distinct Romance languages with different vocabulary, pronunciation, and grammar rules. They also have different cultural influences and histories, with Spanish originating from the Iberian Peninsula and French from Gaul. Additionally, Spain and France have distinct cultures, cuisines, and traditions that set them apart from each other.
Spanish is the official language of Spain, while Mexican Spanish is a regional variation spoken in Mexico. They share many similarities in terms of grammar and vocabulary, but Mexican Spanish incorporates indigenous words and expressions that are unique to the region.
The response to that question depends on whether or not you speak Spanish. Yo (no) hablo español. = I (do not) speak Spanish. If you do speak Spanish, you'd know 'Si, hablo espan~ol' = 'Yes, I speak Spanish'
Mexican is not a language, but a nationality. Spanish is a language spoken in Spain and many countries in Latin America, including Mexico. The main difference between Mexican Spanish and European Spanish lies in accent, vocabulary, and some regional variations in grammar and pronunciation.
Mexicans are people from Mexico, a country in North America, while Dominicans are people from the Dominican Republic, a country in the Caribbean. They have different cultures, languages (Spanish in both cases, but with different accents and slang), and histories.
American Sign Language (ASL) is a visual-gestural language primarily used by the deaf community in the United States and parts of Canada. It involves handshapes, movements, and facial expressions to convey meaning. Spanish, on the other hand, is a spoken language that originated in Spain and is widely spoken in many countries. It uses words, grammar, and syntax to communicate. The biggest difference is that ASL is a visual language while Spanish is a spoken language.
Mexico and Brazil Brazil doesn't speak Spanish they speak Portuguese big difference
It IS hard because Anglos speak in English and Mexicans speak in Spanish. A not-so-hilarious misunderstanding due to this language difference almost resulted in a war with Mexico, as late as 1914.Please see related questions for further detail.
You can speak Spanish.
Do you speak spanish
Both countries speak dialects of Spanish as their national languages. There are only very minor differences.The minority languages are completely different.