Azerbaijani AZ_EN broken?

django@server:~/server/src$ argospm update
django@server:~/server/src$ argospm install translate-az_en
django@server:~/server/src$ argospm install translate-en_az
django@server:~/server/src$ argos-translate --from az --to en “Pücün Azərbayzan medeniyatinin azərbayzın dilinine gədə önəmli olduğu hətk mesyəddəyir.”
2026-08-15 13:21:25 WARNING: Unsupported language: az If trying to add a new language, consider using allow_unknown_language=True
Traceback (most recent call last):
File “/home/django/server/bin/argos-translate”, line 8, in
sys.exit(main())
^^^^^^
File “/home/django/server/lib/python3.11/site-packages/argostranslate/cli.py”, line 63, in main
print(translation.translate(text_to_translate))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “/home/django/server/lib/python3.11/site-packages/argostranslate/translate.py”, line 64, in translate
return self.hypotheses(input_text, num_hypotheses=1)[0].value
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “/home/django/server/lib/python3.11/site-packages/argostranslate/translate.py”, line 328, in hypotheses
translated_paragraph = self.underlying.hypotheses(
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “/home/django/server/lib/python3.11/site-packages/argostranslate/translate.py”, line 201, in hypotheses
apply_packaged_translation(
File “/home/django/server/lib/python3.11/site-packages/argostranslate/translate.py”, line 451, in apply_packaged_translation
sentences = sentencizer.split_sentences(input_text)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “/home/django/server/lib/python3.11/site-packages/argostranslate/sbd.py”, line 160, in split_sentences
doc = self.lazy_pipeline()(text)
^^^^^^^^^^^^^^^^^^^^
File “/home/django/server/lib/python3.11/site-packages/argostranslate/sbd.py”, line 149, in lazy_pipeline
self.stanza_pipeline = stanza.Pipeline(
^^^^^^^^^^^^^^^^
File “/home/django/server/lib/python3.11/site-packages/stanza/pipeline/core.py”, line 267, in init
raise ValueError(f’No processors to load for language {lang}. Language {lang} is currently unsupported’)
ValueError: No processors to load for language az. Language az is currently unsupported

Working:
django@server:~/server/src$ argos-translate --from en --to az “hello how are you”
2026-08-15 13:25:10 WARNING: Language en package default expects mwt, which has been added
Siz necəsiniz

I think that this is related to recent changes we made to the sentence boundary detection system in Argos Translate. If I remember correctly when I trained the Azerbaijani model I used an English Stanza model that I hacked to look like an az model.