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The Lokutor bundle adds two components to Langflow: Lokutor Text to Speech and Lokutor Speech to Text, in English, Spanish, Catalan, Galician, Basque, Portuguese, French, Italian and German. Source: the lokutor folder of lfx-bundles in langflow-ai/langflow, submitted as langflow-ai/langflow#16133 against the release-1.14.0 branch. Until it is merged and released, the components are not available in a stock Langflow install.

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Setup

  1. Create an API key in the dashboard.
  2. Install the bundle’s extra (it has no dependencies of its own): uv pip install "lfx-bundles[lokutor]".
  3. In the Langflow editor, open Bundles > Lokutor and drag a component onto the canvas.
  4. Paste the key into Lokutor API Key, or store it as a Langflow global variable.

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Components

Speech to text reads an uploaded WAV file, or the Data from Lokutor Text to Speech connected to its Audio Data input. If both outputs are connected, one request is made and billed.

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Limits

  • Speech to text takes WAV only (PCM 8 or 16 bit, 8 to 48 kHz, 10 MB; larger only with speaker labels on). Convert other formats first.
  • Text to speech returns WAV, and text is limited to 10,000 characters per component run.
  • Without a language, synthesis has no language hint; set one for predictable results outside English.
  • Errors (invalid key, no balance, unsupported audio) fail the component with the status and message Lokutor returned.

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What was not verified

The components were tested against the live API through their Python classes (a “Hello” synthesized and transcribed back) and with mocked-HTTP unit tests. They were not run inside a running Langflow server: the editor rendering, the Bundles sidebar entry, and how the Playground displays the audio Data were not checked.