The following dictionary maps a current f'Helsinki-NLP/opus-mt-{key}' model to a f'Helsinki-NLP/opus-mt-{value}' model covering the same language, but with a higher BLEU score.
Barring objections, on October 1 I will delete all the keys, so if you use the old, try the new, and if it works worse on your task, complain here and I won’t delete it.
{'bg-es': 'bul-spa',
'es-eu': 'spa-eus',
'eu-es': 'eus-spa',
'es-bg': 'spa-bul',
'ilo-en': 'ilo-eng',
'es-mk': 'spa-mkd',
'es-ca': 'spa-cat',
'es-af': 'spa-afr',
'lt-es': 'lit-spa',
'bn-en': 'ben-eng',
'th-en': 'tha-eng',
'fr-ca': 'fra-cat',
'ga-en': 'gle-eng',
'en-ga': 'eng-gle',
'ko-fi': 'kor-fin',
'es-uk': 'spa-ukr',
'gl-es': 'glg-spa',
'eo-sv': 'epo-swe',
'ca-de': 'cat-deu',
'az-en': 'aze-eng',
'sv-eo': 'swe-epo',
'de-is': 'deu-isl',
'ceb-en': 'ceb-eng',
'ca-fr': 'cat-fra',
'tl-en': 'tgl-eng',
'is-de': 'isl-deu',
'ko-en': 'kor-eng',
'is-es': 'isl-spa',
'es-gl': 'spa-glg',
'bg-fr': 'bul-fra',
'de-af': 'deu-afr',
'ko-es': 'kor-spa',
'es-is': 'spa-isl',
'af-es': 'afr-spa',
'gl-en': 'glg-eng',
'fi-en': 'fin-eng',
'en-bg': 'eng-bul',
'mk-es': 'mkd-spa',
'ka-en': 'kat-eng',
'en-eu': 'eng-eus',
'de-ca': 'deu-cat',
'ar-de': 'ara-deu'
'ROMANCE-en' : 'roa-en', # identical
'en-ROMANCE' : 'en-roa',
}