Aleksander Kotbury developed a Polish Text-to-Speech number normalization feature for the OsmAnd-resources repository, focusing on improving the naturalness and accuracy of spoken street names and destinations. He implemented helper functions in JavaScript to convert numerical street references into their correct Polish word forms, addressing common mispronunciation issues in navigation. By leveraging his skills in internationalization and text-to-speech, Aleksander established a reusable approach for handling numbers in TTS, laying the foundation for future language support. The work delivered clear business value by enhancing real-world routing experiences and demonstrated a thoughtful, targeted engineering effort within a focused one-month development period.