It would be nice to have multi-language support, otherwise hosts using other languages would have english mixed in the content, which looks unprofessional.
Looks some useful reference for this in: https://github.com/blockonomics/whmcs-bitcoin-plugin/blob/cdf4d963b42e6e32bba7f6e62a15aa6c2ab21c78/modules/gateways/blockonomics/lang/english.php
It would be nice to have multi-language support, otherwise hosts using other languages would have english mixed in the content, which looks unprofessional.
I don't know how feasible this is, but I found this section in the WHMCS Documentation: https://developers.whmcs.com/addon-modules/multi-language/