How can I add a new language to Internationalization (like: ar-IL ru-IL etc)

Hi, I want to add other languages to Internationalization like: ar-IL ru-IL etc., How can I do that?

Many thanks

I’m having this exact issue, did you manage to find a solution? @Tomer_Amsalem

We have the same issue we are trying to add these three languages
Mizo (lus), Chhattisgarhi (hne) ISO_639-3 and Bhojpuri (bho) ISO_639-3. Please let us know if there is a way to add new languages into strapi.