My friend needs school help

What language is that?

Ya that's what I read too

Well, the only sense I can make out of this is that "private English" might refer to a person, as in a soldier. But really the sentence doesn't make any sense at all. I feel like there needs to be another word.

The teacher ducked up probably.

It doesn't make sense and teacher, more so of the younger generations, are people and make mistakes. So he or she probably made some idiotic mistake and every kid is panicking trying to find a reason to the sentence.

your friend won't master english

http://cambridgeenglishonline.com/Phonetics_Focus/

Here's something I found for English phonetics. And the symbols that your friend is using are nonexistent.

I think Morning might translate to Mourning actually, as your friend did write homophone beneath it. So, Mourning becomes private English?

I can't see how it would become anything else than what you mentioned

Well, having homonym under becomes and private also means that those words could also use a different definition than usual.

Morning becomes entertainment english

It can be the mourning word. Because in phonetics mourning equals morning. It's written like this ˈmɔːnɪŋ.

Well, I suppose I should chime in, here, seeing as how I'm a teacher of English for native speakers.

First, let me point out that "phonetic spelling" will vary depending upon the alphabet used. A Slovak speaker will use different coding than a native speaker of English because they use different sounds for similar graphemes (e.g. the letter "c").

Leaving that aside, however, the most likely interpretation of what was written by your teacher would be "Mourning becomes private English." This phrase makes sense within the context of mourning (an act of grieving) being a very personal and private experience.

"Mourning" is a noun and the subject of the sentence. "Becomes" is the verb and means "flatters" or "beautifies." The adjective "private" refers to both the style and content of the English used while speaking to someone in mourning. "English" refers to both the actual language and style in which it is used.

Another way to say "Mourning becomes private English" would be "Close and personal expressions within English are beautified in the act of mourning."