After the initial adjustment on Indonesian to allow at most 30% of machine translation for the whole translation (T221353), and based on the feedback (T219851#5166329), it seems the threshold is too strict in some cases.
The following change is proposed to increase the current threshold (+10%):
On Indonesian Wikipedia (and only there), the threshold will be adjusted to prevent the publication of translations with an overall amount of >40% of unmodified contents.
We need to keep in mind the potential for false positives, since elements such as proper nouns, templates, short section titles, and references are often legitimate unmodified content that is ok for users to publish (so we may need to keep a 5% of margin of error).