argostranslate is missing, or the language pair is missing: diagnose the right layer

Scope and symptoms

A translation node can fail before the Python package imports or after import when it looks for a language model. Confirm that the node actually uses Argos Translate before installing anything.

Search fragments; wording and context vary:

No module named 'argostranslate'

Source-supported context

The Argos Translate examples document the Python interface separately from language-package management. Installing the library does not establish that a model for the requested translation direction is available. V04-ARGOS

Distinguish these cases

1. The interpreter running ComfyUI does not have the dependency declared by the node.

2. The package imports, but the required source language, target language or installed language resource is absent.

3. An index or model download fails because of connectivity, access or cache writes rather than Python import resolution.

Suggested diagnostic sequence

This sequence is editorial guidance, not a diagnosis of your machine.

1. Identify the interpreter and originating node repository from the startup log. Read package metadata in that environment rather than repeatedly installing into the system Python.

2. Install only a genuinely missing dependency using the node's documented version requirements. Restart and note whether the failure has moved from import to resource loading.

3. Inspect installed languages and the requested direction using the official package-management interface. Obtain the corresponding resource from its documented index; renaming arbitrary model files is not a conversion.

4. Test a short, non-sensitive sentence in the actual language direction. For a download failure, record redacted request and cache information and investigate transport or storage separately.

Completion checks

Both package import and a short translation in the intended direction succeed. A successful test in a different direction is not equivalent.

Limits and cautions

No translation-quality or performance benchmark is claimed. Review technical terminology and natural phrasing before publishing translated site content, and keep private source text out of public logs.

Source review: 2026-09-22. No installation, GPU inference or user-environment repair was executed.

Original sources

• Argos Translate: examples and language packages · 2026-09-22

Related guides

• ModuleNotFoundError in ComfyUI even though the package is installed
• Keep a reproducible ComfyUI repair record without exposing secrets