What i want to know is, if you listen to any bands or artists that mainly don't sing in English.

I only have two bands...
Rammstein - probably one of the most listened to non-english bands, they are a German hard rock band, they are an amazing live band.
Maximum the Hormone - a Japanese metalcore/nu metal band, they are most notable for having 2 songs as the INTRO and OUTRO in the anime Deathnote.

Basshunter is from Sweden or somewhere, and a fair few of his songs are in not-English. He does dance music, but it's good dance music lol. I like his stuff a lot.

The only Basshunter song i have heard was one about DotA.

One band i found when i was staying up late and they came on one the music channels on Foxtel were a Finnish folk metal band called Korpiklaani.

I heard this song 'Keep on Galloping' and its really good, i have listened to their other songs but i don't really like their others.

Plus the lead singer looks like James Hetfield from Metallica.

Queens of the Stone Age sung Gonna Leave You in Spanish.

I like it.

I actually listen to tonnes of Japanese songs (Most of them were from an anime)

I listen to tonnes too and not all from anime. crazy stuff though lol, like In Flames, soilwork etc
listened to some maximum the hormone. rammstien obviously lol

I listen to a heap of bleach and naruto ost apart from that... ramstien and maximum the hormone are also awesome bands to listen to.

A lot of the singers for Eurovision don't sing in English

Sigur Rós + Jónsi (I had to learn one of their songs for my final Music piece, so I had to try to get the Icelandic pronunciation right )
Ogre You Asshole
World's End Girlfriend
Boris
Melt Banana
Boredoms
Buena Vista Social Club
the Klezmatics
Les Discrets
the Mars Volta (sometimes)
the pillows
Camille
Yaël Naïm (she sings about 70% in Hebrew and the rest English)
Mr.Children
KUKL + Sugarcubes + Björk
Gogol Bordello (sometimes)
Yellow Magic Orchestra + Ryuichi Sakamoto
Hazel Nuts Chocolate

Plus, half of what I listen to hasn't got lyrics at all, most of which is made by non-English speaking bands like Mono and Christian Fennesz