I still don’t know if you can tell or not. The pp who said that language at 5 is a predictor of later academic success is interesting. I have heard this before.
Both of mine were severely language delayed - DS’s speech was unintelligible to anyone other than us until he was 7. He then became very articulate overnight. He caught up with his peers and has remained average in our local primary and now high school. He’s Y8. Predictions are that he is bright, but lazy. He works at the subjects he loves and does the minimum in the others. He is on the ASD pathway.
DD’s speech was understandable and she had excellent vocabulary but her diction was poor, and to an extent remains so. She is much more naturally diligent than her brother but wasn’t learning to read and was clearly struggling and was subsequently diagnosed with dyslexia. She is now also diagnosed with dyspraxia, ADHD and autism. She is currently 11 and her reading and mathematics are at Y3/4 stage. We work a great deal with her and she has private coaching with a dyslexia specialist and ongoing speech therapy.
Both children are curious and interested in the world and knowledge about current affairs, politics, ethics, religion - we talk a lot as a family. DD loves building, design, the natural world, geography, science and DS loves reading, writing, drama, film, gaming, computers. They are both lower high school and at this point, i will be chuffed if they both get 5 GCSE passes under their belts, just to give them the greatest number of options for the next stage they choose.
But who knows, I could have an Oxbridge graduate on my hands - but I doubt it. I am incredibly proud of them both.