Hernandez posted a message on Instagram on Wednesday asking fans to end their derogatory chants during their opponents' goal kicks.
Mexico caused a major shock by beating Germany 1-0 in their opening game in Group F. They next play South Korea on Saturday.
Mexicans have long shouted the word - slang for a male sex worker - which gay rights groups argue is homophobic.
Thousands of Mexican fans have flooded into Russia for the World Cup and some chanted the abuse during the match against Germany on Sunday, prompting FIFA to announce disciplinary procedures earlier this week.
The chant was also widely heard at Mexico games in the 2014 World Cup in Brazil, when FIFA took no action, but the governing body has since launched a clamp-down. Other Latin American teams, including Argentina and Chile, have also been fined.
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