foreign-thon-old/docs/getting-started.md

Getting Started

Installation

pip install foreignthon
pip install foreignthon-es   # add Spanish
pip install foreignthon-ta   # add Tamil

For CLI use across projects, prefer pipx:

pipx install foreignthon

Writing a file

Name your file script.<lang>.py — the extension tells ForeignThon which language pack to use.

# script.es.py
definir sumar(a, b):
    retornar a + b

para i en rango(5):
    imprimir(sumar(i, 1))

Running

fpy run script.es.py        # transpile and run
fpy compile script.es.py    # output a .compiled.py file
fpy check script.es.py      # validate without running

Overriding the language

Via shebang comment at the top of the file:

# foreignthon: es

Or via CLI flag:

fpy run script.py --lang es

Errors

Errors are shown in your language first, English below: [ES] ErrorDeDivisionCero: Error: división por cero [EN] ZeroDivisionError: division by zero File "script.es.py", line 3

Variable names

Variable names are optional — you can use English or your language freely:

# both work fine in the same file
definir calculate(anchura, altura):
    area = anchura * altura
    retornar area

Local dev setup

git clone <repo>
cd foreignthon
python -m venv .venv && source .venv/bin/activate
pip install -e "packages/foreignthon[dev]"
pip install -e packages/langs/es
pip install -e packages/langs/ta
pytest packages/foreignthon/tests/ -v