Here are some possibilities:
* Chutney: This is the most common translation, but it often refers to sweet or sour chutneys, while chatnas can be spicy or savory.
* Relish: This is a good choice if the chatna is used as a condiment or topping.
* Dip: This applies if the chatna is thick enough to be dipped into.
* Sauce: This is a general term that works if you want to emphasize the liquid consistency.
* Condiment: This is a more formal term that can be used for any food item that adds flavor to another dish.
It's best to use a more specific term if possible. For example, you could say "green chili chatna" or "mint coriander chatna" to make it clearer what kind of chatna you're referring to.