Which language is the best/suitablest one for song singing?

Which language do you think is the best/suitablest one for song singing?

Shuimo finds it very pleasant to hear songs sung in languages like Spanish, Japanese, English, of course, apart from my mother tongue Chinese!

Spanish love songs are just awesomely cool!

What about you?

English, Spanish and Italian

No doubt, Italian, Japanese, French, are the best ones for singing songs.

The most suitable language is Spanish because it's the only language I understand when singing. The rest are just unintelligible mumbling for me, specially English songs. I can't tell about French because nowadays there are not important singers in French so I can't judge it. Once I listened to a French rapper and it was just hilarious.