@Gleb:

You want a website to learn languages, but you don't want criticism of any kind (and apparently it makes you extremely angry). You will never learn a language that way. There's a huge difference between being a grammar Nazi and simply trying to give an English learner feedback.

"Informal language is a language either"

The problem people have with "wanna" and "gonna" isn't that they're informal. I write pretty informally on Italki, and I think most people do too.

The 'issue' with "gonna" and "wanna" is that they're not words people comsciously say, but rather transliterations of how "going to" and "want to" come out when speaking quickly, and writing "wanna" or "gonna" is a dead giveaway that you're not a native speaker. 

By the way, "İ" doesn't exist in English. It's a common mistake among Turkish speakers.

Now, when you read the last paragraph, how did you feel? A normal person would feel grateful for the help, or surprised about what I said. How did you feel? If you were insulted that someone would deign to offer you help, no community will be able to help you until you fix your personality.

I will talk about my people because I know what goes on their mind when it comes to using "Wrong English". Back then when I started learning English at language schools (horrible days), students would want to use these slang and wrong use of English to sound more cool and "near-native". If you see some Brazilians who are learning English writing on facebook groups, jeez, they always write" u, ur or even they make up things like u'r (to mean: you are) because they truly believe that writing in such way their english will be sounding more native and cool and that "implies" you know the "Real spoken language". Sad but true! 

I've given up correcting these mistakes, and fear that we have to accept that English is changing. 

Hello Karen.

About slang use, I want to add something. I have a hearing disability. Therefore, using slang also in speech sets my teeth on edge! I can understand "I want to" and "I am going to" far better than this "wanna", "gonna" and other occurances of slang. I am also irritated when non native speakers are copying that in their speech, to sound more native. Please do not do that. I just cannot understand people if they short things off to 'popular' slang.

I agree. It's quite disconcerting to see it pop up time and time again. I remember that on one particular occasion, I had already correct the author's usage and he continued to use these words on subsequent posts thinking that it sounded like "real American English", so I stopped correcting his work altogether,

Unfortunately, saying that they're slang words just seems to heighten their appeal, as if they were the Rosetta Stone to crack the code of fluency and sound "native", instead of just sounding uneducated or being a dead giveaway as a "native speaker" imposter.

I'd love to hear people's ideas on how to "de-sexify" its usage.