This is the technical support forum for WPML - the multilingual WordPress plugin.
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Background of the issue:
I followed your documentation and set up 3 sites locally, one for English, one for Spanish, and one for Japanese. Each of them is a separate site in WP Network with a subdomain. I set up WPML on the English site.
Symptoms:
WPML stopped working, and I suspect it's because it's trying to submit to /es/, which is already reserved for a network subsite.
Questions:
Is your plugin WP multisite compatible in the way described in the documentation where each site can have a different language?
Am I missing something in the setup process?