Here's what you need to know:
* "Dulce" in Spanish means "sweet".
* "Kak" is a Russian word that can mean "how" or "like", but it's usually used with other words to form phrases.
To translate "dulce" into Russian, you would use "сладкий" (sladkiy).
Here are some examples:
* "Это сладкое" (Eto sladkoe) - This is sweet.
* "Я люблю сладкое" (Ya lyublyu sladkoe) - I love sweet things.
If you're looking for a phrase that includes "kak" and means something similar to "sweet", you could use "как сладко" (kak sladko), which means "how sweet".