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WindyWord/
translate-windy-hplt-en-fa

Name: translate-windy-hplt-en-fa
Availability: InStock

HPLT/translate-en-fa-v2.0-hplt_opus

finetune

cc-by-4.0

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translate-windy-hplt-en-fa — en to fa

CTranslate2 INT8 bilingual translation model, derived from HPLT/translate-en-fa-v2.0-hplt_opus (the HPLT project, CC-BY-4.0).

CC-BY-4.0 permits commercial use and modification and requires attribution; this notice provides it. Windstorm Labs did not train the base model.

Recovery note

HPLT publishes native Marian (.npz + .spm + .vocab) and marks its repos inference: false. An earlier conversion of this model to transformers format corrupted the weights, producing untranslatable output, and the model was written off. It was recovered on 2026-07-26 by converting the original .npz with the official Marian converter. The model was always fine; the conversion was not.

What was changed

A deliberately minimal LoRA fine-tune ("windy hallmark") merged into the base weights.


Rank / alpha	8 / 16
Learning rate / steps	2.5e-06 / 50
Target modules	`q_proj`, `v_proj`
Seed	42 (reproducible)
Training data	Helsinki-NLP/opus-100 en-fa (hub), 2000 sentence pairs
Tensors modified	36
Max absolute weight delta	4.309e-05

Provenance

base   model.bin sha256  265fdb93d1be22173199823489d20b126bc8e9782ef9d6b65014b97279469061
this   model.bin sha256  20ec0abce17eae5008e52997b73469ef29f77eb3c2cc1dbc465c750808c42270

Verified on the quantized artifact you download, not merely internal weights.

Evaluation

FLORES-200 devtest, 200 sentences, beam 4, CTranslate2 INT8 on CPU. Metrics: spBLEU (flores200 tokenizer) + chrF (word_order=0).

	spBLEU	chrF
this model	32.9	51.94
upstream, pre-fog	32.79	—

Limitations

One language pair only (en to fa).
FLORES-200 is news and encyclopedic prose; it says little about conversational register.
No human evaluation was performed.

WindyWord/translate-windy-hplt-en-fa