Well, here is one of the cores of the problem. I’m glad you have and understand those applications, and for them, you say you don’t want what they do. Somehow Scrivener is to do better??
A deeper core is that Scribble does not understand either Telagu or Tenglish. Thus it very clearly in practice will not let you be successful with either.
It iis not a fault of Scrivener ‘not natively supporting’ Scribble, I think rather surely… In fact, it supports it just fine – as soon as Scribble was added to the iPadOS, about version 14 I think.
There is probably a deeper version of Scribble, not necessarily public so that it could be supported, which you’ll find if you experiment with Apple Notes, as I did among the many this afternoon. This is very unsatisfying, because in this case it tries to be far too smart.
Apple Notes/Scribble will consistently correct words it doesn’t know for the assigned language into breakdowns of syllables at first, and if you pursue the word, it will make a final decision after a few tries, and then always present its opinion of what the word should be – very wrongly compared to the letters it earlier knew you wrote (the syllables).
This is neural network behavior gone too far, of course, but there is notthing better it can do without Apple having invested in training for Telugu, or in your specific case, Tenglish. Which as a crossbreed, I suspect is rather irregular, and also probably has variants for the same Telugu words, both of which would make the training (and the network cabability) demands much higher. But we don’t get to this point without the investment, which perhaps in time Apple India will make. and then see if the tech in devices can handle it.
These are deep waters, young person, and not susceptible to the idea or the complaint that someone didn’t do something they ‘could’ – they would even have to discover any degree of ‘could’'.
The soundness of underlyingg design and implementation on either side is shown that Scribble just 'plugs in ’ to a much older software app; and that Apple is in fact able to have so many apps just use it, if they implemented the text interfaces properly. My flawless test resi;ts with Korean orthograpy kind of makes the point, I think.
Which brings us back to understanding that Scribble itself is the problem. No app is going to let you do Tenglish, until or unless Apple does the work to understand that writing vocabulary. It’s quite possible that spell check is part of teh picture of driving the ‘intelligence’ also – such systems are by nature often hybrid like this, gainiing effect by communicating, so that would need a new vocaulary also, if this is far easier than the neural training.
You would benefit just from knowing how many years Apple tried before having successful handwriting at all – beginning with the Newton, which I can tell you was almost unusable actually. And in fact, the recent ability has been silently improving by leaps and bounds, as I find it understands my own handwriting far better now, actually at a very useful level, which it was not a year or so ago.
Be grateful, no?