This might help you when learning either Spanish or English
Sympathetic is not simpático that means nice, sympathetic means comprensivo, someone who can put him/her-self in someone's shoes
Actually, a lot of people think that actually means current, but actually is translated as de hecho o en realidad, to contrast a previous idea
Mascot, easy, Spanish has the word mascota, meaning pet,but mascot is an object that represents good luck
Contest, some people might think that means contestar (answer), but it means concurso
More examples here (sorry, both are in Spanish, but you can easily understand the examples):
40 falsos cognados
False cognates
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