I'm looking for standard IPA but every book, even dictionaries implement it differently.
for example [ɑ] and [ɑ:] or this symbol [ɛ] vs [e].
Some books omit the [i] sound which is the last sound of word happy, and some books say that this symbol equals [iː].
This also happens to [uː]. I know that colons like symbols are for length, but why is there so many differences? Even Wikipedia says:
Please note that several of these symbols are used in ways that are specific to Wikipedia and differ from those used by dictionaries.
https://en.wikipedia.org/wiki/Help:IPA_for_English
Where is the standard form that every text should obey?
And what's the role of these ones in the game? Bold ones.
[ɑ] AH
[ɜ] UR
[ɔ] AW