Another English "language" that confuses non English speakers and makes translations very difficult?

Yeah, I think it would be a dialect and I'm actually kind of surprised this site doesn't have different dialects for English. Because British English is different than what we speak here in the US, and as you said, even different parts of the US use different dialects. And it can be difficult to understand certain dialects if people aren't familiar with them!

I think the problem is that a Brit can understand a song in American English, so there aren't many reasons to have two distinct categories for that. Some words are different across the pond, but a quick Google research is enough.
Thing is, English is a very widespread language. If we were to add all the dialects of English, it would just get messy. Even just adding the most spoken ones. Remember that the UK alone has more than half of the dialects of English spoken in the whole world.
It would be better to just have a category for those dialects of English that are less understood like Jamaican English, which already has a separate category. Distinguishing American, British, Australian and New Zealand's English (just to name a few) into different categories when the differences are subtle and not always present isn't the wisest idea.

We have categories for some dialects of English: Scots, Jamaican, and the creoles of Bislama and Tok Pisin.
While I'm not very knowledgeable in the dialectology of English, if there are other dialects of it in which we have texts and which differ from standard English in a similar degree, there would be no reason not to add a category.

I think it is good, if possible, to put footnotes into the lyrics to help people from other parts of the world who may not know American English phrases from the 30s or 50s or 70s, or from certain regions. It's good to try to imagine someone from another country trying to understand the song. They may not yet know popular idioms, either.

https://lyricstranslate.com/en/harry-connick-jr-im-old-cowhand-lyrics.html

https://lyricstranslate.com/en/stevie-wonder-uptight-everythings-allrigh...

https://lyricstranslate.com/en/sam-cooke-chain-gang-lyrics.html

https://lyricstranslate.com/en/sparks-cool-places-lyrics.html

https://lyricstranslate.com/en/bing-crosby-and-louis-armstrong-gone-fish...

Sciera's comment "created a monster" (me, sorry!)

Of course, as Sailor PokeMoon2 brought out, sometimes NO ONE can understand the lyrics, not even someone native to the region, and you can only guess. The same is true in any language or genre.

ϕιλομαθής, I might need your help some day too. Thanks for coming forward.

I stumbled across this website one day. Maybe it will be useful. http://www.amiright.com/misheard/lyrics/country-w.shtml

Within the USA, the absolute worst dialect is Southern Creole, spoken in the bayous of Louisiana. It's a French-English bastardization, lost in time. It's so bad, that whenever one such person appears on TV in the USA, they have to use subtitles, because practically no one in the USA can understand this dialect. As for the Southern dialects across the USA, some are stronger than others. And, as small towns die, and more people move to the cities, these dialects are becoming more "normalized", because it is VERY HARD to get a job, if you have a strong Southern dialect for two main reasons. First, some people will not be able to understand you, and jobs like clear communication. But, also, secondly, there is generally the prejudice view that people who speak with strong Southern accents have received a substandard education. And as such, many people will automatically discriminate against someone who has a strong Southern accent, just because they think that they are stupid. This is of course, not true. But prejudice and stereotypes exist everywhere. At least, I'll tell you the truth. As for me, I can speak and understand the Southern accent, so I don't understand when people have problems with it. But, I do admit they say some confusing things sometimes. They have sayings that aren't common elsewhere. My favorite is "Bless her heart!" which normally means "She's one stupid bitch." (LOL) I also speak "proper" American English (like on the TV). But, I can't understand some British accents, so I get how they might have problems with ours.

We have a LOT of songs that people write MISHEARD lyrics to. Some are quite funny. Normally it's a British person trying to understand an American song, or vice versa. Australians thought the Go-Go's song "Our Lips Are Sealed" was "Alex the Seal". Sometimes the accents make for huge mistakes and hilarious results happen. The best I can remember is a song that was sung with a STRONG British dialect called "Come on Eileen". Practically no one in the USA could understand what he was singing, and here's the result. https://www.youtube.com/watch?v=LJ-agcLs7Y8 Enjoy!

I remember a radio spot that had an American singing Chumbawamba's 'Tubthumping'. The true lyrics are: "I get knocked down, but I get up again." In the commercial, it was sung as "I got knocked down, by an elephant".

https://youtu.be/FOEwO58a_w8 ha ha this is sound but it still really illustrates our points lol

LOL

So the legend that the Japanese cannot pronounce the "r"s is not a legend.

There are so many English dialects. :s
https://en.wikipedia.org/wiki/List_of_dialects_of_English
https://en.wikipedia.org/wiki/English-based_creole_language
https://en.wikipedia.org/wiki/List_of_English-based_pidgins
Country music... Maybe Texan English?

DarkJoshua even if there are few differences, I find it very interesting but you're right it would just get messy.

And here: Learn Japanglish with this song.
https://www.youtube.com/watch?v=zhGnuWwpNxI

English isn’t my first language, so please excuse any mistakes. (Are there any mistakes? xd)

Okay, thank you.