diff --git a/Development-da.md b/Development-da.md
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+# Udvikling
+
+🌐 [English](Development) · **Dansk** · [Bahasa Melayu](Development-ms)
+
+Sæt projektet op først ([Installation](Install-da)). Udvidelsen `dev` installerer pytest, ruff, mypy og import-linter.
+
+## Kør testene
+
+```bash
+python -m pytest
+```
+
+## Kør de kontroller, CI kører
+
+```bash
+python -m ruff check .
+python -m mypy
+lint-imports
+```
+
+## Byg kildedokumentationen
+
+```bash
+doxygen Doxyfile
+```
+
+Åbn `build/html/index.html`. Installér Doxygen fra [doxygen.nl](https://www.doxygen.nl/) eller din pakkehåndtering.
+
+## Sådan virker exception handling
+
+`spell_word` (i `domain/spelling.py`) slår hvert bogstav op i ordbogen i en `try`-blok. Et tegn, der ikke findes i alfabetet, giver en `KeyError`, som `except`-blokken gør til en `InvalidWordError`. `generate_phonetic` (i `application/phonetic.py`) fanger fejlen, beder brugeren skrive kun bogstaver og spørger igen, indtil ordet er gyldigt.
+
+## Kodens opbygning
+
+| Mappe | Indhold |
+| --- | --- |
+| `src/nato_phonetic_alphabet/domain/` | Staveregelen, uden input og output |
+| `src/nato_phonetic_alphabet/application/` | Use casen og dens porte |
+| `src/nato_phonetic_alphabet/adapters/` | CSV-læseren og konsollen |
+| `src/nato_phonetic_alphabet/constants.py` | Alle programmets konstanter |
+| `tests/` | pytest-tests, som spejler `src/` |
+
+Afhængigheder peger indad: adapters kender applikationen, applikationen kender domænet. import-linter håndhæver det.
+
+## Pull requests
+
+Én gren og én pull request pr. milepæl; CI skal være grøn. Projektet følger SQA- og QC-frameworket i `framework/`; se `docs/` for planen og review-optegnelserne.
diff --git a/Development-ms.md b/Development-ms.md
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+# Pembangunan
+
+🌐 [English](Development) · [Dansk](Development-da) · **Bahasa Melayu**
+
+Sediakan projek dahulu ([Pemasangan](Install-ms)). Pilihan tambahan `dev` memasang pytest, ruff, mypy dan import-linter.
+
+## Jalankan ujian
+
+```bash
+python -m pytest
+```
+
+## Jalankan semakan yang dijalankan oleh CI
+
+```bash
+python -m ruff check .
+python -m mypy
+lint-imports
+```
+
+## Bina dokumentasi sumber
+
+```bash
+doxygen Doxyfile
+```
+
+Buka `build/html/index.html`. Pasang Doxygen dari [doxygen.nl](https://www.doxygen.nl/) atau pengurus pakej anda.
+
+## Cara pengendalian pengecualian berfungsi
+
+`spell_word` (dalam `domain/spelling.py`) mencari setiap huruf dalam kamus di dalam blok `try`. Aksara yang tiada dalam abjad menimbulkan `KeyError`, yang ditukar oleh blok `except` kepada `InvalidWordError`. `generate_phonetic` (dalam `application/phonetic.py`) menangkap ralat itu, meminta pengguna memasukkan huruf sahaja dan bertanya semula sehingga perkataan itu sah.
+
+## Susun atur kod
+
+| Folder | Kandungan |
+| --- | --- |
+| `src/nato_phonetic_alphabet/domain/` | Peraturan ejaan, tanpa input dan output |
+| `src/nato_phonetic_alphabet/application/` | Kes guna dan portnya |
+| `src/nato_phonetic_alphabet/adapters/` | Pembaca CSV dan konsol |
+| `src/nato_phonetic_alphabet/constants.py` | Semua pemalar program |
+| `tests/` | Ujian pytest, mencerminkan `src/` |
+
+Kebergantungan menghala ke dalam: adapter mengenali aplikasi, aplikasi mengenali domain. import-linter menguatkuasakannya.
+
+## Pull request
+
+Satu cabang dan satu pull request bagi setiap milestone; CI mesti hijau. Projek ini mengikut rangka kerja SQA dan QC dalam `framework/`; lihat `docs/` untuk pelan dan rekod semakan.
diff --git a/Development.md b/Development.md
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+# Development
+
+🌐 **English** · [Dansk](Development-da) · [Bahasa Melayu](Development-ms)
+
+Set up the project first ([Install](Install)). The `dev` extra installs pytest, ruff, mypy and import-linter.
+
+## Run the tests
+
+```bash
+python -m pytest
+```
+
+## Run the checks that CI runs
+
+```bash
+python -m ruff check .
+python -m mypy
+lint-imports
+```
+
+## Build the source documentation
+
+```bash
+doxygen Doxyfile
+```
+
+Open `build/html/index.html`. Install Doxygen from [doxygen.nl](https://www.doxygen.nl/) or your package manager.
+
+## How the exception handling works
+
+`spell_word` (in `domain/spelling.py`) looks every letter up in the dictionary inside a `try` block. A character that is not in the alphabet raises a `KeyError`, which the `except` block turns into an `InvalidWordError`. `generate_phonetic` (in `application/phonetic.py`) catches that error, tells the user to enter letters only and asks again until the word is valid.
+
+## Code layout
+
+| Folder | Content |
+| --- | --- |
+| `src/nato_phonetic_alphabet/domain/` | The spelling rule, with no input or output |
+| `src/nato_phonetic_alphabet/application/` | The use case and its ports |
+| `src/nato_phonetic_alphabet/adapters/` | The CSV reader and the console |
+| `src/nato_phonetic_alphabet/constants.py` | Every literal of the program |
+| `tests/` | pytest tests, mirroring `src/` |
+
+Dependencies point inward: adapters know the application, the application knows the domain. import-linter enforces it.
+
+## Pull requests
+
+One branch and one pull request per milestone; CI must be green. The project follows the SQA and QC framework in `framework/`; see `docs/` for the plan and the review records.
diff --git a/Home-da.md b/Home-da.md
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+# Det fonetiske NATO-alfabet
+
+🌐 [English](Home) · **Dansk** · [Bahasa Melayu](Home-ms)
+
+Et konsolprogram, der staver et ord med det fonetiske NATO-alfabet. Det er opgaven fra dag 30 i Udemys "100 Days of Code: The Complete Python Pro Bootcamp" og viser exception handling: input, der ikke er et bogstav, fanges med `try` og `except` i stedet for at få programmet til at gå ned. Det kræver Python 3.13 eller nyere og har ingen runtime-afhængigheder.
+
+![Programmet staver ordet Hello](images/spell-word.png)
+
+| Side | Læs den, når du vil |
+| --- | --- |
+| [Installation](Install-da) | Oprette et lokalt `.venv` og installere projektet på Windows, Linux eller macOS |
+| [Brug](Usage-da) | Køre programmet og læse dets output |
+| [Udvikling](Development-da) | Køre testene og kontrollerne og bygge kildedokumentationen |
+
+## Hvem det er til
+
+- **Kursister**, der vil have en læsbar løsning med opgavens funktionsnavne (`load_nato_dict`, `generate_phonetic`) at sammenligne med deres egen.
+- **GitHub-besøgende**, der vil se et lille, testet Python-projekt uden runtime-afhængigheder.
+
+## Links
+
+- [Repository](https://git.tirsystem.com/Tirsvad-Udemy-100-days-of-code/030-nato-phonetic-alphabet)
+- [Fejl og ønsker](https://git.tirsystem.com/Tirsvad-Udemy-100-days-of-code/030-nato-phonetic-alphabet/issues)
diff --git a/Home-ms.md b/Home-ms.md
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+# Abjad fonetik NATO
+
+🌐 [English](Home) · [Dansk](Home-da) · **Bahasa Melayu**
+
+Alat konsol yang mengeja satu perkataan dengan abjad fonetik NATO. Ia ialah tugasan hari ke-30 dalam "100 Days of Code: The Complete Python Pro Bootcamp" di Udemy dan menunjukkan pengendalian pengecualian (exception handling): input yang bukan huruf ditangkap dengan `try` dan `except` dan bukannya menyebabkan program terhenti. Ia memerlukan Python 3.13 atau lebih baharu dan tidak mempunyai kebergantungan masa jalan.
+
+![Alat mengeja perkataan Hello](images/spell-word.png)
+
+| Halaman | Baca apabila anda mahu |
+| --- | --- |
+| [Pemasangan](Install-ms) | Mencipta `.venv` setempat dan memasang projek di Windows, Linux atau macOS |
+| [Penggunaan](Usage-ms) | Menjalankan program dan membaca outputnya |
+| [Pembangunan](Development-ms) | Menjalankan ujian dan semakan serta membina dokumentasi sumber |
+
+## Untuk siapa
+
+- **Peserta kursus** yang mahukan penyelesaian yang mudah dibaca dengan nama fungsi tugasan (`load_nato_dict`, `generate_phonetic`) untuk dibandingkan dengan penyelesaian sendiri.
+- **Pelawat GitHub** yang mahukan projek Python kecil yang diuji tanpa kebergantungan masa jalan.
+
+## Pautan
+
+- [Repositori](https://git.tirsystem.com/Tirsvad-Udemy-100-days-of-code/030-nato-phonetic-alphabet)
+- [Penjejak isu](https://git.tirsystem.com/Tirsvad-Udemy-100-days-of-code/030-nato-phonetic-alphabet/issues)
diff --git a/Install-da.md b/Install-da.md
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+# Installation
+
+🌐 [English](Install) · **Dansk** · [Bahasa Melayu](Install-ms)
+
+## Det skal du bruge
+
+- Python 3.13 eller nyere med modulet `venv`
+- Git
+
+## Trin
+
+Alle systemer gør de samme fire ting: klon repository'et, opret et virtuelt miljø kaldet `.venv`, opgradér pip og installér projektet.
+
+### Windows PowerShell
+
+```powershell
+git clone https://git.tirsystem.com/Tirsvad-Udemy-100-days-of-code/030-nato-phonetic-alphabet.git
+cd 030-nato-phonetic-alphabet
+py -3.13 -m venv .venv
+.\.venv\Scripts\Activate.ps1
+python -m pip install --upgrade pip
+python -m pip install -e ".[dev]"
+```
+
+Hvis PowerShell afviser aktiveringsscriptet, så kør først `Set-ExecutionPolicy -Scope Process RemoteSigned`. Det gælder kun for det vindue.
+
+### Linux Debian
+
+```bash
+sudo apt install git python3 python3-venv
+git clone https://git.tirsystem.com/Tirsvad-Udemy-100-days-of-code/030-nato-phonetic-alphabet.git
+cd 030-nato-phonetic-alphabet
+python3 -m venv .venv
+source .venv/bin/activate
+python -m pip install --upgrade pip
+python -m pip install -e ".[dev]"
+```
+
+### macOS
+
+```bash
+brew install python@3.13 git
+git clone https://git.tirsystem.com/Tirsvad-Udemy-100-days-of-code/030-nato-phonetic-alphabet.git
+cd 030-nato-phonetic-alphabet
+python3.13 -m venv .venv
+source .venv/bin/activate
+python -m pip install --upgrade pip
+python -m pip install -e ".[dev]"
+```
+
+## Tjek at det virker
+
+```bash
+python -m nato_phonetic_alphabet
+```
+
+Skriv et ord. Du skal se dets kodeord. Næste side: [Brug](Usage-da).
diff --git a/Install-ms.md b/Install-ms.md
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+# Pemasangan
+
+🌐 [English](Install) · [Dansk](Install-da) · **Bahasa Melayu**
+
+## Apa yang diperlukan
+
+- Python 3.13 atau lebih baharu dengan modul `venv`
+- Git
+
+## Langkah
+
+Semua sistem melakukan empat perkara yang sama: klon repositori, cipta persekitaran maya bernama `.venv`, naik taraf pip dan pasang projek.
+
+### Windows PowerShell
+
+```powershell
+git clone https://git.tirsystem.com/Tirsvad-Udemy-100-days-of-code/030-nato-phonetic-alphabet.git
+cd 030-nato-phonetic-alphabet
+py -3.13 -m venv .venv
+.\.venv\Scripts\Activate.ps1
+python -m pip install --upgrade pip
+python -m pip install -e ".[dev]"
+```
+
+Jika PowerShell enggan menjalankan skrip pengaktifan, jalankan `Set-ExecutionPolicy -Scope Process RemoteSigned` dahulu. Ia hanya terpakai pada tetingkap itu.
+
+### Linux Debian
+
+```bash
+sudo apt install git python3 python3-venv
+git clone https://git.tirsystem.com/Tirsvad-Udemy-100-days-of-code/030-nato-phonetic-alphabet.git
+cd 030-nato-phonetic-alphabet
+python3 -m venv .venv
+source .venv/bin/activate
+python -m pip install --upgrade pip
+python -m pip install -e ".[dev]"
+```
+
+### macOS
+
+```bash
+brew install python@3.13 git
+git clone https://git.tirsystem.com/Tirsvad-Udemy-100-days-of-code/030-nato-phonetic-alphabet.git
+cd 030-nato-phonetic-alphabet
+python3.13 -m venv .venv
+source .venv/bin/activate
+python -m pip install --upgrade pip
+python -m pip install -e ".[dev]"
+```
+
+## Semak ia berfungsi
+
+```bash
+python -m nato_phonetic_alphabet
+```
+
+Masukkan satu perkataan. Anda akan melihat kata kodnya. Seterusnya: [Penggunaan](Usage-ms).
diff --git a/Install.md b/Install.md
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+# Install
+
+🌐 **English** · [Dansk](Install-da) · [Bahasa Melayu](Install-ms)
+
+## What you need
+
+- Python 3.13 or newer with the `venv` module
+- Git
+
+## Steps
+
+Every system does the same four things: clone the repository, create a virtual environment called `.venv`, upgrade pip, install the project.
+
+### Windows PowerShell
+
+```powershell
+git clone https://git.tirsystem.com/Tirsvad-Udemy-100-days-of-code/030-nato-phonetic-alphabet.git
+cd 030-nato-phonetic-alphabet
+py -3.13 -m venv .venv
+.\.venv\Scripts\Activate.ps1
+python -m pip install --upgrade pip
+python -m pip install -e ".[dev]"
+```
+
+If PowerShell refuses to run the activation script, run `Set-ExecutionPolicy -Scope Process RemoteSigned` first. It only applies to that window.
+
+### Linux Debian
+
+```bash
+sudo apt install git python3 python3-venv
+git clone https://git.tirsystem.com/Tirsvad-Udemy-100-days-of-code/030-nato-phonetic-alphabet.git
+cd 030-nato-phonetic-alphabet
+python3 -m venv .venv
+source .venv/bin/activate
+python -m pip install --upgrade pip
+python -m pip install -e ".[dev]"
+```
+
+### macOS
+
+```bash
+brew install python@3.13 git
+git clone https://git.tirsystem.com/Tirsvad-Udemy-100-days-of-code/030-nato-phonetic-alphabet.git
+cd 030-nato-phonetic-alphabet
+python3.13 -m venv .venv
+source .venv/bin/activate
+python -m pip install --upgrade pip
+python -m pip install -e ".[dev]"
+```
+
+## Check that it works
+
+```bash
+python -m nato_phonetic_alphabet
+```
+
+Enter a word. You should see its code words. Next: [Usage](Usage).
diff --git a/Usage-da.md b/Usage-da.md
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+# Brug
+
+🌐 [English](Usage) · **Dansk** · [Bahasa Melayu](Usage-ms)
+
+Aktivér det virtuelle miljø (se [Installation](Install-da)), og start programmet:
+
+```bash
+python -m nato_phonetic_alphabet
+```
+
+Den installerede kommando gør det samme:
+
+```bash
+nato-phonetic-alphabet
+```
+
+## Stav et ord
+
+Programmet spørger efter et ord og skriver NATO-kodeordet for hvert bogstav i rækkefølge. Store og små bogstaver giver samme resultat.
+
+![Programmet staver ordet Hello](images/spell-word.png)
+
+## Ugyldigt input
+
+Et ciffer, et mellemrum eller et tegn er ikke et bogstav. Programmet siger det og spørger igen.
+
+![Et ord med et ciffer afvises, derefter staves et gyldigt ord](images/retry-invalid.png)
+
+## Tryk Ctrl+C eller Ctrl+D
+
+Afslutter du inputtet (Ctrl+D på Linux og macOS, Ctrl+Z og Enter på Windows) eller trykker Ctrl+C, lukker programmet stille.
diff --git a/Usage-ms.md b/Usage-ms.md
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+# Penggunaan
+
+🌐 [English](Usage) · [Dansk](Usage-da) · **Bahasa Melayu**
+
+Aktifkan persekitaran maya (lihat [Pemasangan](Install-ms)), kemudian mulakan program:
+
+```bash
+python -m nato_phonetic_alphabet
+```
+
+Arahan yang dipasang melakukan perkara yang sama:
+
+```bash
+nato-phonetic-alphabet
+```
+
+## Eja satu perkataan
+
+Program meminta satu perkataan dan mencetak kata kod NATO bagi setiap huruf mengikut urutan. Huruf besar dan huruf kecil memberi keputusan yang sama.
+
+![Alat mengeja perkataan Hello](images/spell-word.png)
+
+## Input tidak sah
+
+Angka, ruang atau tanda baca bukan huruf. Program memberitahu perkara itu dan bertanya semula.
+
+![Perkataan dengan angka ditolak, kemudian perkataan yang sah dieja](images/retry-invalid.png)
+
+## Tekan Ctrl+C atau Ctrl+D
+
+Menamatkan input (Ctrl+D di Linux dan macOS, Ctrl+Z kemudian Enter di Windows) atau menekan Ctrl+C menutup program dengan senyap.
diff --git a/Usage.md b/Usage.md
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+# Usage
+
+🌐 **English** · [Dansk](Usage-da) · [Bahasa Melayu](Usage-ms)
+
+Activate the virtual environment (see [Install](Install)), then start the program:
+
+```bash
+python -m nato_phonetic_alphabet
+```
+
+The installed command does the same:
+
+```bash
+nato-phonetic-alphabet
+```
+
+## Spell a word
+
+The program asks for a word and prints the NATO code word of each letter, in order. Upper and lower case give the same result.
+
+![The tool spelling the word Hello](images/spell-word.png)
+
+## Invalid input
+
+A digit, a space or a punctuation mark is not a letter. The program says so and asks again.
+
+![A word with a digit is rejected, then a valid word is spelled](images/retry-invalid.png)
+
+## Press Ctrl+C or Ctrl+D
+
+Ending the input (Ctrl+D on Linux and macOS, Ctrl+Z then Enter on Windows) or pressing Ctrl+C closes the program quietly.
diff --git a/_Sidebar.md b/_Sidebar.md
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+**NATO phonetic alphabet**
+
+- [Home](Home)
+- [Install](Install)
+- [Usage](Usage)
+- [Development](Development)
+
+**Dansk**
+
+- [Hjem](Home-da)
+- [Installation](Install-da)
+- [Brug](Usage-da)
+- [Udvikling](Development-da)
+
+**Bahasa Melayu**
+
+- [Utama](Home-ms)
+- [Pemasangan](Install-ms)
+- [Penggunaan](Usage-ms)
+- [Pembangunan](Development-ms)
+
+**Links**
+
+- [Repository](https://git.tirsystem.com/Tirsvad-Udemy-100-days-of-code/030-nato-phonetic-alphabet)
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