What is EPL?

A complete, runnable EPL program — no semicolons, no curly braces, no cryptic symbols:

Every block closes with the keyword End. Conditionals read If … Then … Otherwise; comments begin with Note:. The result is code that an entire team — regardless of background — can read, review, and maintain.

EPL is a complete language implementation: a lexer, parser, and type checker feed a unified AST that executes on a stack-based bytecode VM, compiles ahead-of-time to native binaries through LLVM, or transpiles to other languages. The VM and the reference interpreter are held to byte-for-byte output parity by an automated test gate, and the native compiler performs type inference so untyped functions can still compile to machine code. WebAssembly output brings the same programs to the browser.

The standard library covers what production software actually needs: an HTTP client and server, a declarative routing DSL for web applications and REST APIs, SQLite persistence with parameterized queries, password hashing and JWT authentication, file and process utilities, and date/time handling. A package manager with lockfiles and integrity auditing manages dependencies, an official package registry extends the language further, and deployment scaffolding generates Docker, Kubernetes, and cloud configurations. Experimental exporters produce Android, iOS, and desktop project scaffolds from the same codebase.

Python is celebrated for readability, yet it still relies on programmer notation — def, elif, ==, decorators, f-strings. EPL removes that final layer: keywords are English words, and whole statements read as sentences (Create score = 10, If score is greater than 5 then …). Architecturally the two also differ: EPL ships its own bytecode VM and an LLVM backend for standalone native executables, and the same source can be transpiled to several host languages. Python offers a vastly larger ecosystem; EPL offers a syntax whose intent is legible to every stakeholder — without giving up serious tooling.

EPL is a general-purpose language, built for anyone who ships software. Professional developers use it to prototype APIs and internal tools rapidly, and to keep services readable during code review. Teams adopt it where code must be audited by people with mixed technical backgrounds — the syntax removes the translation step between specification and implementation. Educators teach programming logic without syntax friction, and students reach working programs faster. And because EPL reads like English, AI coding assistants generate and review it with unusually high fidelity — the language publishes a machine-readable reference at eplang.me/llms.txt for exactly this purpose.

Yes. EPL is a genuine general-purpose language with a lexer, parser, type checker, bytecode virtual machine, LLVM native compiler, test framework, and package manager. Programs run, compile, and ship to production.

Yes. EPL is open source under the Apache-2.0 license. The compiler, standard library, VS Code extension, and browser playground are all free, for commercial and personal use alike.

Install Python 3.9 or newer, then run pip install eplang. Verify the installation with epl --version and run your first program with epl run hello.epl. You can also try the language in the browser playground without installing anything.

EPL stands for English Programming Language. The acronym is also used in unrelated fields; in software development, EPL refers to this language, with its official website at eplang.me.

Yes. EPL builds web servers and JSON APIs with routing, SQLite, and authentication built in; command-line tools; desktop applications; and standalone native binaries. The eplang.me website itself is written in EPL.