Problems with the translation

Hello, congratulations for the plugin, It is very simple and complete, just I need the translation

I do not get to translate the plugin. I created the files…
wp-content/plugins/woocommerce-pdf-invoices/lang
be-woocommerce-pdf-invoices-ca_ES.mo
be-woocommerce-pdf-invoices-ca_ES.po

Also, I have saved the files in the directory
wp-content/languages/woocommerce-pdf-invoice/lang

but is not translated
I do not know what is happening

Regards, T

https://www.ads-software.com/plugins/woocommerce-pdf-invoices/