Hi SJanasek,
the TranslateSplunk i18n-functionality does indeed not extract/translate site content in JS. I've found a way to use it either way:
You have to add the entries in your messages.mo / po by hand and have to follow the guidelines you've linked regarding file placement.
You then have to add the following to your js:
require([
...
'splunk.i18n',
...
], function(..., i18n) {
Now you are able to use i18n._("variable_name") in your code when naming buttons/labels and so on. The function will return the value defined by the used language and the variable_name in your .po.
Best regards,
Jens
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