I updated the server for my sites related to language learning:
https://easypronunciation.com/en/
http://project-modelino.com/index.php?site_language=english
Now the IPA phonetic converters became even faster and consume less resources.
It took me almost 24 hours to solve all the problems with dependencies. As usually, Japanese morphological analyzer Mecab was the most difficult to update.
Anyway, now everything seems to be up and running.
I will continue additional testing, but in the meantime, if you notice anything unusual, please let me know.
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