'quality_optimized' Produces erroneous translation

[dloarie]

I have seen numerous examples where adding 'quality_optimized' to the search string produces an erroneous translation, usually involving a possessive adjective.

Example (Italian):
Original phrase: 'Mio padre è alto.'

Translated to Spanish
With 'quality_optimized': 'Tu padre es alto.'
Without 'quality_optimized': 'Mi padre es alto'

I am mystified how this can occur.

[JanEbbing]

I can not reproduce this, sorry:

$ curl  -X POST https://api.deepl.com/v2/translate \
  --header "Content-Type: application/json" \
  --header "Authorization: DeepL-Auth-Key KEY" \
  --data "{
    \"text\": [\"Mio padre è alto.\"], \"target_lang\":\"ES\", \"model_type\":\"quality_optimized\", \"show_billed_characters\":true
  }"
{"translations":[{"text":"Mi padre es alto.","detected_source_language":"IT","billed_characters":17,"model_type_used":"quality_optimized"}]}

Nor on deepl.com, with/without source language, I always get "Mi padre es alto". Do you have more examples of this?

[dloarie]

import deepl

auth_key = "blablabla"
deepl_client = deepl.DeepLClient(auth_key)

def translate(text, source_lang, target_lang, model_type='quality_optimized', formality='prefer_less'):
response = deepl_client.translate_text(
text,
source_lang=source_lang,
target_lang=target_lang,
model_type='quality_optimized',
formality='prefer_less'
)
return response.text

print("DeepL Spanish ⇄ English translator")

italian = 'Mio padre è alto.'
spanish = translate(italian, 'IT', 'ES')
print(spanish)

[JanEbbing]

Thanks, with formality = prefer_less I can reproduce. This looks like a bug in our translation models to me, I'll investigate

[JanEbbing]

Just wanted to give an update here: This is apparently a wider issue and our research team is working on it :) Unfortunately model updates usually take a bit, as the process is more involved.