This is grammatical, but something like this would not be said in English. The phrase "Language can be lovingly romantic" would not be used - of course language can be lovingly romantic; it can also be violently offensive, etc. This is just too obvious to be stated in English.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
This is grammatical, but something like this would not be said in English. The phrase "Language can be lovingly romantic" would not be used - of course language can be lovingly romantic; it can also be violently offensive, etc. This is just too obvious to be stated in English. And of course you have to use language correctly - that's also too obvious to be stated.
I answered you before when you asked about this. Yes, you can say that, sort of. It's really the person using the language who is being lovingly romantic. Loving requires action, and an abstract thing like language can only be loving in special contexts like this one.