The literal translation is "Love is a sweet flavor." While you can just say Sralanh Pha-em (Love Sweet), the full sentence is more poetic and complete.
In Khmer culture, love is often compared to food or nature. When we say "Love is sweet," we mean it brings joy and comfort to the heart. love is sweet speak khmer
If you want to say something more personal, you can say: The literal translation is "Love is a sweet flavor