Going from Estonian to Uyghur (ئۇيغۇرچە) has a composite linguistic distance of 90% (heuristic estimate). Below is the dimension-by-dimension breakdown.
Shared vocabulary, cognates, and loanwords.
Morphology, syntax, word order, cases.
Shared sounds and phoneme inventory.
Latin → Arabic
Uralic ↔ Turkic
The 5 languages with the lowest linguistic distance from Estonian:
A quick 3-question check between Estonian and Uyghur. No signup.