Alexa now has multilingual mode and will respond in the language the speaker is using. Instructions in comments. : r/Spanish
How to change the language on your Amazon Echo | Android Central
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Pandora + Alexa
Help! Some parts of my Alexa App are in Japanese (Language set to English and location set to US; Linked Amazon account is also set to US) : r/amazonecho
How to Change Alexa's Language: 13 Steps (with Pictures) - wikiHow
How to Update Your Alexa Skills for Spain : Alexa Blogs
How to Change Alexa Language to Spanish and Other Languages
How to change Alexa's voice, language, speed & wake word - Tech Advisor
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Amazon Alexa Setup For Spanish Language Learning : Changing Settings On the Echo Dot - YouTube