Package ES_EN.argostranslate doesn't work

[argosopentech]

The current Spanish->English model was ported from Opus-MT here:

OPUS-MT Language Models Port Thread

I went through the Firefox translation performance testing data (BLEU and COMET scores) to find models where Opus-MT has better performance than Argos Translate. These Opus-MT models could be good candidates to port to Argos Translate to replace the existing models. Opus-MT model has better performance than the Argos Translate model: cs-en, tr-en, sk-en, en-fi, hu-en, en-hu, fi-en, en-da, en-ar, ko-en, uk-en, en-es, en-uk, en-cs, id-en, da-en, en-id, en-sk, en-de, de-en Argos Translate model h…

The old Spanish model I trained with OpenNMT-tf is probably still available on the Google Drive.