Update README.md

Author: Bartek12282

README.md

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-# PolyPy-Multi-Track-Audio-Engine
-PolyPy is my first programming project. It is a lightweight, multi-track audio engine written in Python that allows you to compose simple melodies using different wave types and instruments. 
+# PolyPy – Multi-Track Audio Engine (Alpha)
+
+**PolyPy** is my very first programming project. It is a lightweight, multi-track audio engine written in Python that allows you to compose simple melodies using different wave types and instruments.
+
+### 🌍 Language / Język
+**The program does not automatically detect your system's language.** By default, it starts in **Polish**. 
+To switch to **English**:
+1. Go to: `Ustawienia` (Settings).
+2. Change `Język` to `EN`.
+3. Click `Zastosuj` (Apply).
+
+### ✨ Key Features
+* **Multi-track support:** Create and manage multiple audio tracks simultaneously.
+* **Built-in Instruments:** Piano, MIDI Square, Guitar, Distortion Guitar, and Noise-based percussion.
+* **Visualizations:** Real-time FFT (Spectrum) and Waveform visualizers during playback.
+* **Import/Export:** Save projects to JSON or export to high-quality `.WAV` files.
+
+### 🚀 About the Project
+This is my first step into coding and digital signal processing. It’s an early alpha version, so I built it to learn how audio waves, GUI (Tkinter), and multithreading work together.
+
+### 🛠️ Requirements
+To run the source code, you will need:
+* Python 3.x
+* `numpy`
+* `matplotlib`
+
+You can install the dependencies using:
+`pip install numpy matplotlib`