Change Woocommerce languange on a multisite install

For WooCommerce to support any language other than the default (US English), you have to make sure of the following — it doesn’t matter whether you’re on a multisite or single-site install:

  1. In the general settings screen (Settings -> General in the admin panel), the Site language should be your desired language. In your case, you should select Español. This changes the language WordPress uses to Spanish.

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  2. The localization file (.mo) for WooCommerce should be in the correct folder. For WooCommerce, this is wp-content/langauges/woocommerce. The file name is woocommerce-[locale].mo. You can download the .mo-file for your language on WordPress.org. Click on the percentage in the Stable column for your language and export the language .mo-file on the bottom of the page (.e.g https://translate.wordpress.org/projects/wp-plugins/woocommerce/stable/es/default).

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    The downloaded file should be renamed and placed in the aforementioned folder, yielding wp-content/languages/woocommerce/woocommerce-es_ES.po in your case.