Hi everyone!
I am Alexandre, Full-Stack Developer at Crisp. At Crisp, we have been using Ghost for our blog and have been really happy with the experience.
We have recently been focused on scaling our SEO strategy to new markets with our blog, by making it international. Sadly, since it’s not supported officially by Ghost, we had to find a way to do it 
We made it work, created a workflow to manage everything from a single gulpfile.js, and wrote a blogpost about it if you want to do the same.
We can now manage content in multiple languages and easily add more languages to the website as we scale.
Here is the blogpost explaining how we did it:
Feel free to share what you think below 
PS: We read this forum a lot during this project, so thank you to everyone who shared their experience about internationalizing Ghost.
We used the Casper theme from Ghost that we modify to fit our design style. And then our illustrations are custom made by designers we work with