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Swedish to Tumbuka translation model translate-sv-tum

Open machine translation from Swedish into Tumbuka, published by Windstorm Labs on Hugging Face.

Task: Translation: Swedish → Tumbuka
Languages: Swedish sv, Tumbuka tum
Lineage: OPUS-MT
Format: transformers (Marian), safetensors
Hugging Face: WindyTranslate/translate-sv-tum
Last updated on HF: 2026-08-04

Quality

Benchmark	chrF++	BLEU	Band	Measured
FLORES-200 dev, 48 sentences	21.40	2.81	Limited	2026-08-04

A screening score on 48 sentences, not a publication result. Bands: Excellent ≥ 60, Good 45–60, Usable 30–45, Limited 15–30, Not recommended < 15. Method and caveats.

Recorded output (sentence 1, first 110 characters)

Source: I måndags meddelade forskare från Stanford University School of Medicine att man tagit fram ett nytt diagnosti…
Reference: Pa Mande, ŵasayansi ŵakufuma ku yunivesite yakusanda vya minkhwara ya Stanford University School of Medicine ŵ…
This model: Pa Mande, nkhwantha ya masambiro ya masambiro gha ku Australia yikapharazga uthenga wa mu Baibolo wakukhwaskan

How to run

Shell

pip install transformers sentencepiece torch

Python

from transformers import AutoTokenizer, AutoModelForSeq2SeqLM

repo = "WindyTranslate/translate-sv-tum"
tok = AutoTokenizer.from_pretrained(repo)
model = AutoModelForSeq2SeqLM.from_pretrained(repo)

batch = tok(["<Swedish text>"], return_tensors="pt", padding=True)
print(tok.batch_decode(model.generate(**batch), skip_special_tokens=True)[0])

Tested: Pattern run on 2026-10-01 against WindyTranslate/translate-tc-big-en-fr with transformers 4.57.6 and 5.18.0 on CPU ("Où se trouve la gare ?"); multi-target token prefix run against translate-tc-bible-big-mul-deu_eng_nld. Not run on every model individually.

Licence and attribution

Licence: Apache-2.0
Upstream: Helsinki-NLP/opus-mt-sv-tum
Upstream licence: Apache-2.0
Attribution: Based on OPUS-MT model Helsinki-NLP/opus-mt-sv-tum by Helsinki-NLP (Language Technology Research Group, University of Helsinki). Licensed Apache-2.0.

Copy this into your NOTICE file (or equivalent) when you ship the model:

NOTICE

This product uses the model WindyTranslate/translate-sv-tum
(https://huggingface.co/WindyTranslate/translate-sv-tum), published by Windstorm Labs (https://windstormlabs.com).
Based on OPUS-MT model Helsinki-NLP/opus-mt-sv-tum by Helsinki-NLP (Language Technology Research Group, University of Helsinki). Licensed Apache-2.0.
Windstorm Labs modified the upstream weights; the model card describes what was changed.
Licensed under the Apache License, Version 2.0: https://www.apache.org/licenses/LICENSE-2.0

This is a convenience, not legal advice. See Licensing.

Related models

Model	chrF++ (FLORES-200 dev)	Licence
Tumbuka to Swedish translate-tum-sv	21.4 Limited	Apache-2.0
Swedish to English translate-sv-en	67.8 Excellent	Apache-2.0
Swedish to French translate-sv-fr	54.1 Good	Apache-2.0
Swedish to Dutch translate-sv-nl	53.5 Good	Apache-2.0
Swedish to Indonesian translate-sv-id	52.4 Good	Apache-2.0
Swedish to Romanian translate-sv-ro	51.2 Good	Apache-2.0
Swedish to Finnish translate-sv-fi	50.5 Good	Apache-2.0
Swedish to Afrikaans translate-sv-af	50.0 Good	Apache-2.0