Latin languages (Italian, French, Spanish) are great for romantic phrases, and in general much more musical and poetic, me thinks.

Germanic languages are more useful for giving instructions or issuing orders (and I'm a native Swedish speaker, basically a German dialect, myself.)

Achtung! Rauchen verboten! has a certain ring to it, and there's no misunderstanding that... In Italian, vietato fumare sounds so much more gentle, like something to linger over but not necessarily obey.