Keep getting websites and ads in Spanish

When browsing or playing games I get sometimes other languages when I go to websites. For instance I will go to Samsung.com and the page that opens will be a foreign language web page. Usually Spanish, but I'm not sure because I don't understand it. When playing games that are downloaded from Play Store, the ads will be in a different language. I've checked my settings in Firefox and it is set to English. I can't figure out how to get rid of the foreign language that appears.