https://en.wikipedia.org/wiki/Basic_English
https://en.wikipedia.org/wiki/English-based_creole_language
https://en.wikipedia.org/wiki/List_of_English-based_pidgins
This one especially: https://en.wikipedia.org/wiki/Tok_Pisin
Many non-native English speaker I know (myself included) still have a hard time understanding some English words after 15-20 years or more of English as a second language and having lived in English-speaking countries for years. A native English speaker could still pronounce a word and they would have very little idea how to write it, and therefore won't be able to look it up in a dictionary.
On the contrary, after a few minutes/hours of learning Spanish pronunciation, one is usually able to write words that they hear pronounced slowly, since they are written as they are pronounced and there is only "one" way to pronounce them. Same for Esperanto I believe, or language like Korean (although it's a different alphabet so it takes more time for anyone used to the latin alphabet, but it is still phonetic).
Even native English speakers struggle with it. This is the so-called "curse of the autodidact": when people have read quite a bit on a specialized topic but never had a spoken conversation about it, and mispronounce technical words or place the stress on the wrong syllable.
Not by coincidence, in USA they have spelling challenges aired nationwide.
In Esperanto there is a 1-1 relationship between letters and sounds by design, so a spelling bee wouldn't be a challenge.
If there were a single way to write each sound, then the spelling in itself wouldn't really matter, as we would only learn the spelling of each sound once and be done with it; we'd always recognize it.
Cognates sometimes take their more obvious English phonetic spelling.
Issue with those two languages specifically is they don’t have great past present and future tenses. “I have a car” and ^“I had car”* are initially similar and you need to differentiate later, “I have a car but I sell it, so I won’t drive you”. so English with its tenses is important - but “P as in pterodactyl” isn’t.
Indonesian English is only used by a few people (mostly urban youngsters), but from what I know Manglish is common because some Malaysians refuse/don't see the point in learning Malay, which is sad...
Looks a lot like Scots :-)
Whatever, inventing a new language (even based on another one heavily) only makes sense if it is going to be better than all the other existing by orders of magnitude. IMHO just making an existing language slightly easier to learn while annoying all the existing speakers (English speakers reading a text won't immediately recognize tuf as tough) does not qualify. As long as we don't manage to produce a distinct engineered language so unquestionably amazing that a huge part of the people would adopt it readily the only viable alternative remaining is just sticking with an existing language that is reasonably easy to learn (e.g. English is usually considered easier to learn than Chinese or even than French but I'd love to know if it actually is easier for people whose native language is neither Indo-European nor Sino-Tibetan and uses a different kind of alphabet) and already is spoken by a significant portion of the whole set of people it is meant for.
https://www.davidpbrown.co.uk/jokes/european-commission.html
But in general the quirks in English are quite easy to drop without losing meaning, things like definite and definite articles can be made optional and then you end up with something not dissimilar to how many basic ESL speakers from different countries communicate with each other anyway...