Though he has lived in Beijing for ten years or so, he still speaks with a heavy accent.

他虽然在北京住了十来年了，可是家乡口音一点没改。

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For example, if you are having trouble understanding a speaker because of a heavy accent, you can ask him or her to speak more slowly.

比如，如果由于说话人的浓重口音而无法理解他/她的话，你可以请求对方放慢讲话的速度。

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So whenever he said English, it would be in two or three words and drenching with a heavy Spanish accent.

英语准确的音节对于他来说是有些强人所难。他说起英语来，只能是两三个词连在一起，而且还带着浓重的西班牙口音。

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In an interview with National Public Radio in 1987, Rostropovich recalled a conversation with his mother, describing, in his heavy accent, his hands as a beautiful gift.

NPR: On Rostropovich: Cellists Remember a Master

Her unease lasted through the introductions of two elderly Russian couples, two elderly Chinese couples, three middle-aged Dominican couples, one handsome young Haitian man, one very tall, very old, and very loud Haitian woman with a funny name Oolna and one dark-skinned woman who spoke so fast and with such a heavy accent that nobody could understand what she said or where she came from.

NEWYORKER: Luda and Milena

They fled to North America in the 19th Century to avoid persecution, but many Hutterites still speak with a heavy German accent and they mostly talk and pray in a German dialect.

BBC: Getting away from 'the world' Hutterite-style