Find word error rate calculation?

[yunzqq]

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[yunzqq]

calculate the word error rate

[nealmcb]

Calculating WER and related statistics seems like a task like that would best be left to a separate tool.

Offhand, this looks like a reasonable candidate tool if you like Python: jiwer · PyPI

You also might want to edit your question to remove the extraneous unanswered and/or irrelevant questions.
Best wishes.