Turkish UI is not an English UI translated word by word
Turkish changes layout, suffixes, tone, casing, date/time formatting and pricing presentation.
Localization is a product-system problem, not a dictionary problem.
Turkish strings are often longer, suffixes depend on context, and the sen/siz distinction requires a consistent product voice. Locale-aware casing matters because I/İ/ı/i rules differ from English. Date, time and currency conventions also affect comprehension.
Test the longest Turkish strings on mobile, centralize tone rules and avoid naive string concatenation for dynamic sentences.
A Turkish interface should be designed to behave naturally in Turkish, not merely translated from English.
The Turkish Interface Problem
Where English-first product patterns break in Turkish: microcopy, suffixes, locale behavior, tone, KVKK and AI-assisted development.