Qwen3 0.6B — Easy Language (Q4_K_M GGUF)

A LoRA fine-tune of Qwen/Qwen3-0.6B that rewrites spoken sentences into the Easy Language register of the same language — FALC in French, Leichte Sprache in German, Lectura Fácil in Spanish, and the Inclusion Europe "Easy-to-Read" standard elsewhere.

It is a same-language simplification model, not a translation model. Given French in, it produces simpler French out. It never translates.

Built for Live Linguist, an on-device live captioning app. Everything runs locally; this model exists so that simplification never requires a server.

Prompt contract — this is not optional

The model was trained against one exact rendering, and deviating from it degrades output silently. There is no error, just worse rewrites.

<|im_start|>system
{SYSTEM_PROMPT}<|im_end|>
<|im_start|>user
Original: {SENTENCE}
Rewritten:<|im_end|>
<|im_start|>assistant
<think>

</think>

Three things people get wrong:

  1. The assistant turn is pre-filled with an EMPTY think block — literally <think>\n\n</think>\n\n. This is Qwen3's enable_thinking=false form. Omit it and the model may emit reasoning into your caption.
  2. {SYSTEM_PROMPT} carries a trailing /no_think soft switch. It belongs to the prompt, not the template.
  3. No few-shot examples, and no rolling context. The fine-tune internalised the register, so it was trained on the bare Original:/Rewritten: turn. Injecting examples or prior segments is out-of-distribution and bleeds context into the rewrite.

The system prompts are the per-language framework packs in the app repo under core/src/main/resources/framework_packs/.

Sampling — fixed, and evaluated under these values

parameter value
temperature 0 (greedy)
repeat_penalty 1.3
repeat_last_n 20
n_predict 128

These are not tuning knobs. The gate results below were produced under exactly these settings.

Evaluation

20-prompt validator-clean rate across 12 languages, scored by the same validators the app uses at runtime (sentence length, one-idea-per-sentence, no invented content, still-in-source-language):

95.00% (19/20) against a 94.50% MLX baseline.

Quantisation

Q4_K_M, which this model tolerates: it scores 95.00% against a 94.50% baseline. The larger 1.7B sibling does not tolerate Q4_K_M and ships at Q5_K_M instead — a quantisation level is a per-model measurement, not a global default.

Limitations

  • Twenty prompts is a screen, not a benchmark. At n=20 the binomial interval is roughly ±10 pp. This catches gross breakage; it does not establish parity of quality.
  • Grammar is imperfect at these sizes. A real 0.6B output was "La semaine dernière, nous avons partis à la médina" — the register is right (disfluency removed, run-on split) and the auxiliary is wrong (sommes, not avons).
  • Simplified text is a paraphrase. The app labels it "~ simplified — may not be exact" for this reason. It should not be relied on where exact wording is legally or medically material.
  • No real-hardware latency measurement exists yet. The 0.6B has not been benchmarked on a phone.

Licence and attribution

Apache-2.0, inherited from the base model.

  • Qwen3 by Alibaba Cloud — Qwen/Qwen3-0.6B
  • Easy Language fine-tune by ndgold

Provenance

  • LoRA: rank 16, alpha 320 (scale 20.0 × rank), dropout 0.05, on q_proj/k_proj/v_proj/o_proj of the top 16 layers only; max sequence 1024; 1 epoch.
  • Trained locally on an RTX 5060 Ti (sm_120).
  • SHA-256 of this artifact: 1be8c19cc1153d33535c3ad6a3306be7d84ecc4ae7a171bf6c1b428c6737ffb8

The app pins this hash and verifies it after download; a mismatch aborts the install.

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