Gwyneth Paltrow encouraged her kids Apple, 9, and Moses, 7, to speak with her only in Spanish at a recent wedding, the new issue of Us Weekly reveals Credit: Pascal Le Segretain/Getty Images

En Espanol, por favor! Gwyneth Paltrow wants her kids Apple, 9, and Moses, 7, to be well-rounded and worldly -- so much so that in an effort to teach them to be bilingual, she sometimes encourages them to speak with her only in Spanish, a source reveals in the new issue of Us Weekly.

While at Cameron Diaz's Beverly Hills home for the Oct. 12 wedding of Diaz's assistant, Jesse Lutz, the Iron Man 3 star, 41, urged her children to put their language skills to use. "Gwyneth reminded them through the party," a witness tells Us.

"At one point," the onlooker says, "Apple came to her table and asked, in Spanish, if she could sit on her lap!"

Married to Coldplay singer Chris Martin since December 2003, the Goop founder recently defended her parenting choices in an interview with U.K. magazine Red.

"That idea of 'Oh God, if I don't show up to this concert, all the other mums are going to think I'm terrible.' Well, so f--king what," the Oscar winner said. "It's like, when I'm with my kids, I give them everything I have. And when I'm not, I give whatever I'm doing everything I have. And that's my work/life balance."

"I've made it work for me, but it doesn't matter what my specific thing is," she continued. "It's like, what's your specific thing? How do you want your life to look? It doesn't matter what anyone else thinks. It matters what you think of yourself. And what your children think...I'd say, do what is right for you and don't give a s--t what anyone else thinks."