Begin with evidence from analytics, customer enquiries, search demand and existing revenue. A language with meaningful traffic and clear commercial intent usually deserves attention before a larger market with no operational path.
Treat regional variants as deliberate choices. French for Canada and French for France share a language, but pricing, terminology, search behavior and compliance expectations differ. Configure locale-specific routes only when your content and team support that distinction.
Launch a manageable set first. Confirm translation quality, support coverage, billing, SEO monitoring and update synchronization before adding more languages. A controlled rollout produces stronger data and a repeatable expansion process.